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Competitive swimwear
Competitive swimwear
Competitive swimwear
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A mixed-sex pair in their swimsuits, participating in FINA World Championships of synchronised swimming.
A woman wearing a racing competitive racerback bikini

Competitive swimwear refers to the swimsuit, clothing, equipment, and accessories used in the aquatic sports of swimming, diving, artistic swimming, triathlon, and water polo.

Some swimsuits are designed specifically for swimming competitions where they may be constructed of a special low resistance fabric that reduces skin drag. Most competitive swimmers wear special swimsuits including partial bodysuits, racerback styles, jammers and racing briefs to assist their glide through the water thus gaining a speed advantage.

For diving in water temperatures above 25 °C (77 °F), special bodysuits called "dive skins" are worn. These suits are made from spandex and provide little thermal protection, but they protect the skin from jellyfish stings, sunburn, and abrasion. This kind of suit is also known as a 'Stinger Suit'. Some divers wear a dive skin under a wetsuit, which allows easier donning and (for those who experience skin problems from neoprene) provides additional comfort.

Unlike regular swimsuits, which are designed mainly for aesthetic appearances, swimsuits intended to be worn during competitions are manufactured to assist the athlete in swimming competitions. They reduce friction and drag in the water, increasing the swimmer's forward motion efficiency. The tight fits allow for easy movement and are said to reduce muscle vibration,[1] thus reducing drag. This also reduces the possibility that a high-forward dive will remove a diver's swimwear. Starting around 2000, to improve the effectiveness of the swimsuits, engineers have taken to designing them to replicate the skin of sea-based animals, sharks in particular.

In July 2009, FINA voted to ban non-textile (non-woven) swimsuits in competitive events from 2010. The new policy was implemented to combat the issues associated with performance-enhancing swimsuits, hindering the ability to accurately measure the performance of swimmers.[2] Subsequently, the new ruling states that male swimsuits may maximally cover the area from the navel to the knee and female counterparts from the shoulder to the knee.[3][4]

Some swimmers use a specialized training suit called drag suits to artificially increase drag during practice. Drag suits are swimwear with an outer layer of looser fabric – often mesh or nylon – to increase resistance against the water and build up the swimmer's endurance. They come in a variety of styles, but most resemble a looser fitting square-cut or swim brief.

History

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Main article: History of competitive swimwear

The history of competitive swimwear has been dominated by concerns over public nudity in the first half of the 20th century and by efforts to reduce water drag in the second half.[5] Those efforts initially lead male swimmers to reduce the early sagging one-piece swimsuits down to briefs only. Goggles were used in the crossing of the English Channel back in 1911, but only in 1970 appeared at international competitions. With the advent of rubber technology, latex swimming caps became mass-produced in the 1920s, and more efficient silicone caps appeared in the 1970s.

With the development of new materials that tightly fit the body and offered lower resistance to water than human skin, this trend was reversed to a complete body coverage from heels to neck and wrists. In 1999, Australian competitive swimmer Ian Thorpe signed with Adidas for an undisclosed six-figure sum, to race in their new bodysuit, although the national team was sponsored and wore outfits designed by Speedo.[6] Thorpe's success in the 2000 Summer Olympics wearing the Adidas full-length black polyurethane bodysuit,[7] in contrast to other swimmers wearing textile swimwear (males wore legskins, jammers, or briefs, while females wore racerback maillots), led to other swimming manufacturers such as Speedo and Mizuno to create their own rival bodysuits. Thorpe subsequently worked with Adidas which in 2003 released the Adidas Jetconcept bodysuit, whose design "came from the V-shaped grooves currently used on the wings and fuselage of civil aircraft".[8]

The LZR Pro and LZR Elite lines were launched on 13 February 2008, with the LZR Elite being marketed as "the world's fastest swimsuit."[9] It was the focus of Speedo's campaign for the 2008 Summer Olympics, spearheaded by Michael Phelps of the United States. They created a holographic (visually generated) video of Phelps wearing the suit which was displayed in London, Sydney, New York, and Tokyo on the day of the suit's release. Speedo's LZR Racer had become so effective by the eve of the 2008 Summer Olympics that many swimmers, despite them or their swimming federations having exclusive contracts with other apparel makers, have chosen the LZR Racer over competing bodysuits.[10] At that year's Olympics in Beijing, 94% of all swimming races were won in that suit,[11] While 98% of all medals were won by swimmers wearing that suit, and 23 out of the 25 world records broken were achieved by swimmers competing in the LZR suit.[12] As of 24 August 2009, 93 world records had been broken by swimmers wearing a LZR Racer,[13] and 33 of the first 36 Olympic medals have been won wearing it.[14]

In 2009, FINA rules and regulations were altered, effective from 1 January 2010. Suits made with polyurethane were banned because they made athletes more buoyant. These rules also banned suits that go above the navel or below the knee for men and suits that extend past the shoulders or cover the neck for women [15] FINA stated that it "wishes to recall the main and core principle is that swimming is a sport essentially based on the physical performance of the athlete".[16]

Suits

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Bodyskin

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See also: History of competitive swimwear § Non-textile swimsuits
Bodyskin swimsuits worn by Amanda Beard (left), Michael Phelps (center), and Natalie Coughlin (right).

A bodyskin is a style of competitive swimwear worn by both female and male athletes. Bodyskins are normally made of technologically advanced lycra-based fabrics designed to hug the body tightly and provide increased speed and decreased drag resistance in the water.

The bodyskin resembles the design of a dive skin, commonly used by snorkelers and scuba divers for warm weather climates. The primary distinguishing feature is the material from which the bodyskin suit is made.

Some bodysuits provide full body coverage from the ankles to the neck and wrists, such as Ian Thorpe's Adidas Jetconcept bodysuit, which made its debut in 2003.[8] Sleeveless designs such as the Speedo LZR Racer were popular in the 2008 Summer Olympics; Speedo also produces a body skin designed specifically for the backstroke.[17] Other competing bodysuits include Acquablade, Fastskin, and Sharkskin, which are produced by Mizuno, Asics, Descente, Arena, and Nike.

Swimmers reported that body skins improved buoyancy. This is true as long as the suits remain dry. As such, they are recommended for distances under 200m.[18]

The national coach of a small country stated that the suits need exact sizing and resulting high cost "increas[ed] the disparity between the haves and have nots."[19] As with most technologically advanced fabric swimwear, body skins were only commonly used at highly competitive levels of the swimming sport and are known to sell for prices over US$400.[10] Despite their cost, a single bodysuit can only be used for a handful of races, as getting in and out of the suit repeatedly would damage its form-fitting properties, memorably when Thorpe tore his Adidas bodysuit right before the 4×100 men's freestyle relay podium ceremony in the 2000 Summer Olympics.[7]

Bodyskins were banned from FINA competitions from the start of 2010 after many national swimming federations demanded the action, and leading athletes such as Michael Phelps and Rebecca Adlington criticised the suits.[20] They continue to be used for other purposes, including research.[17]

Briefs

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Main article: Swim briefs
A man wearing swim briefs

A swim brief refers to any briefs style male swimsuit such as those worn in competitive swimming, water polo and diving. The popularity of the Australian Speedo (est. 1928) brand racing brief has led to the use of its name in some countries (e.g. the United States) to refer to any racing brief, regardless of the maker. Occasionally, the Speedo genericized trademark also applies to square cut swimsuits, but in general, the generic term is used for swim briefs. Swim briefs are also referred to as competition briefs, bathers, racer bathers, posing briefs, racing briefs, and colloquially in Australia as "budgie smugglers".[21]

Like underwear briefs, swim briefs feature a V-shape front and a solid back providing form-fitting coverage. They typically are worn below the lower waist. They are generally secured by thin banding at the upper thighs and either a drawstring around the waist or an elastic waistband. Swim briefs are most often made of a nylon and spandex (Lycra) composite, while some longer-lasting suits are made from polyester and still others from other materials. Most swim briefs have a beige or white front lining made of a similar fabric.

Drag suit

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A drag suit designed by Arena.

A drag suit is a pair of baggy square-cut or brief-style trunks that competitive swimmers may wear over their normal suit to provide extra resistance ("drag") from the water. This allows the swimmer to get more out of their training than they would without a drag suit. Drag suits are meant to be worn over a long period of time to wear in the material and possibly tear the fabric. The more worn-in, torn or ripped the drag suit, the more resistance it provides the swimmer. Since drag suits make swimming more difficult, swimmers do not wear drag suits in competition. Drag suits originated as older swimsuits at the end of their useful life that swimmers would then wear over another suit.

Kneeskin

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A knee skin swimsuit
A kneeskin swimsuit

A kneeskin is a type of competitive swimwear worn by female swimmers. It is no longer worn by male competitive swimmers due to the requirement that they keep their upper body uncovered. Kneeskins are normally made of technologically advanced lycra-based fabrics designed to hug the body tightly and provide increased speed and decreased drag resistance in the water.

The kneeskin is similar in design to the full bodyskin, but the kneeskin does not have leggings covering or beyond the knee. The kneeskin resembles a "shortie" style wetsuit only made of drag-reducing fabric instead of neoprene and commonly features a zippered back. Most competitive swimwear brands such as the Speedo LZR Racer line, Tyr Sport, Inc. and Arena Powerskin line produce suits of this type. As with most technologically advanced fabric swimwear, kneeskin suits are only commonly used at highly competitive levels of the swimming sport and are known to sell for prices in excess of US$200.[22]

Jammer

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Swim jammer

A jammer, also called a swim jammer, is a style of swimsuit worn by male swimmers, used mainly in competition to obtain speed advantages. They are generally made of nylon and lycra/spandex material, but may be made of polyester, and have a form fitting design to reduce water resistance. The materials usually dry fairly quickly. They provide moderate coverage from the mid-waist to the area above the knee, somewhat resembling cycling shorts or compression shorts worn by many athletes. They provide greater leg coverage than swim briefs and square leg suits, although they also have slightly more water resistance.

Legskin

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A legskin swimsuit

A legskin is a type of competitive swimwear worn by male swimmers. Most legskins are made of technologically advanced lycra-based fabrics designed to hug the body tightly and provide increased speed and decreased drag resistance in the water. The legskin covers from the swimmer's mid-waist to his ankle and resembles leggings. One advantage of the legskin over other suit styles that cover the arms is flexibility, especially for strokes that require broad arm movement.

Since 2009, legskins have been banned for competition swimming by FINA since they gave an unfair advantage to swimmers who wore them; the ban includes bodysuits.

Racerback

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See also: One-piece swimsuit
A woman wearing a racerback one-piece swimsuit

A racerback is a type of women's swimsuit design common today among competitive swimwear and incorporated into some types of women's clothing. The top-back of the swimsuit is not covered to provide flexibility and movement of the arms during swimming.

Square cut

[edit]

The square cut or square leg style suit is a form-fitting male swimsuit used as a slightly less revealing style than swim briefs for water polo and diving, or for recreational wear. Like swim briefs, they are made of a nylon and spandex blend. They typically sit low on the waist and high on the thigh, but provide more coverage for the upper leg than briefs. The square-cut style was popular as a recreational swimsuit for men during the 1950s.[23]

Suits of this type are named for the coverage that they provide to the upper thighs due to a square seam opening for the leg. Square leg suits range in appearance from those similar to swim briefs with a slightly straighter front and wider side panelling (eliminating the arc appearance on the leg), to those resembling boxer briefs by providing an inch or more of fabric coverage over the upper section of the leg.

The square leg suit of the 1970s made a fashion revival in Australia in 2002 with the introduction of colorful floral and retro geometric patterned suits by swimwear label Funky Trunks.[citation needed] The style is popular amongst competitive swimmers for pool training and for recreational swimmers in the pool and at the beach.

Square cut swimsuit

Accessories

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  • Earplug – Device to protect ears from loud noises
  • Fistgloves
  • Goggles – Forms of protective eyewear that do not enclose the nose
  • Hand paddle – Plastic plate worn on the hand by swimmers during training
  • Kickboard – Device used to keep someone above water
  • Noseclip – Device worn during water activities
  • Pull buoy – Floatation device used in swim workouts
  • Snorkel – Tube for breathing face down at the surface of the water
  • Swim cap – Cap worn while swimming or bathing
  • Training fin – Footwear used for personal propulsion through water
  • Weight belt – Ballast carried to counteract buoyancy

References

[edit]
Revisions and contributorsEdit on WikipediaRead on Wikipedia

Competitive swimwear

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Competitive swimwear refers to the specialized, form-fitting garments designed for swimmers in pool-based and open water competitions to minimize hydrodynamic drag, provide muscle compression, and enhance overall performance efficiency. However, the tight and compressive fit of these suits can lead to physical discomfort, such as restricted breathing or movement in some cases, particularly if not properly fitted. Moreover, the form-fitting and sometimes revealing design has been associated with psychological effects among female swimmers, including increased self-objectification, body shame, appearance anxiety, body dissatisfaction, and heightened risk of disordered eating, stemming from feelings of being "on display," social comparisons, and the accentuation of body form which may enhance external perceptions of sexual attractiveness while promoting objectification and negatively impacting self-perception and confidence. These suits, often called "tech suits," must comply with strict (formerly FINA) approval standards to ensure fairness, limiting enhancements to textile-based materials and prohibiting non-porous or buoyancy-aiding elements. The history of competitive swimwear traces back to the late , when athletes wore heavy woolen one-piece suits that absorbed water and increased resistance, as seen in the first modern Olympics in 1896. A pivotal advancement came in with Speedo's introduction of the racerback design, which exposed the upper back to improve arm mobility and was credited with helping Swedish swimmer Arne Borg secure gold in the 1,500m freestyle at the Olympics. By the 1950s, synthetic materials like replaced , offering lighter weight and lower drag, while nylon-elastane blends became standard in the second half of the for better stretch and fit. The marked a surge in technological innovation, with Speedo's 2000 Fastskin suit—mimicking shark skin denticles—contributing to 13 of 15 world records broken at the Olympics, and the 2008 , featuring panels bonded with , enabling to win eight golds in by reducing drag by up to 8%. However, the proliferation of full-body, non-textile suits like Arena's X-Glide and Jaked's J01, which led to 43 world records at the 2009 Rome World Championships, prompted to ban non-woven materials effective 2010, restoring emphasis on skill over equipment advantages. As of 2025, regulations mandate that swimsuits be constructed from permeable textile fabrics—primarily , , and elastane () blends—with a minimum air permeability of 80 liters per square meter per second and a maximum thickness of 0.8 mm when stretched. Coverage is restricted to shoulders-to-knees for women and waist-to-knees for men in pool events, with a maximum of 9-11 seams above the to limit structural complexity, while open water suits may extend to ankles but prohibit wetsuits unless water temperatures fall below 18°C. Prohibitions include zippers, external power systems, and any modifications post-approval, with suits undergoing rigorous testing for and speed aids to maintain competitive integrity. Contemporary tech suits incorporate hydrophobic coatings and targeted compression zones to reduce by 4-6%, balancing with .

History

Early Developments

The origins of competitive swimwear can be traced to ancient civilizations, where athletes in and often swam nude or with minimal coverings during public baths and events, prioritizing functionality over . By the in , societal norms shifted toward elaborate woolen garments for and early activities, with women donning long, loose dresses made of or that reached from neck to ankles, often weighted with lead to prevent floating and maintain propriety. These outfits, sometimes paired with and , were cumbersome and absorbed water heavily, hindering movement but aligning with Victorian emphasis on coverage. Men wore similar full-body suits resembling long underwear, extending to wrists and ankles. In the early , competitive swimwear evolved into one-piece suits for both men and women, balancing modesty with basic functionality as gained popularity as a . These garments covered the body from shoulders to knees or thighs, reducing exposure while allowing slightly better mobility than 19th-century bathing costumes; however, the material still swelled when wet, increasing drag and slowing swimmers. Pioneers like Australian swimmer advocated for tighter-fitting one-pieces around 1905, facing arrests for indecency but influencing designs that prioritized streamlined coverage for performance. Late in the and into the early 20th, alternatives like and emerged for competitive use, offering lighter weight and reduced water resistance compared to —, in particular, clung less when wet and minimized drag, though it often required undergarments to avoid transparency. The debut of swimming at the 1896 Olympics marked a milestone, with male competitors required to wear basic one-piece suits or trunks providing full-body coverage from shoulders to mid-thigh for modesty, conducted in open water amid modest facilities. Women were excluded from Olympic swimming until 1912 in , where regulations mandated similar one-piece suits covering shoulders to knees, often in or early variants to ensure propriety while enabling competition in events like the 100m freestyle. At the 1908 London Olympics, men's suits adhered to these coverage standards, exemplified by British swimmer Henry Taylor's one-piece attire during his three gold medal wins, though women did not yet participate in swimming. By the , a shift to —a semi-synthetic lighter and more form-fitting than —began influencing competitive suits, allowing for sleeker designs that reduced drag without sacrificing coverage. A pivotal advancement in came with Speedo's introduction of the racerback design, which exposed the upper back to improve arm mobility and was credited with helping Swedish swimmer Arne Borg secure gold in the 1,500m freestyle at the Amsterdam Olympics. This period's innovations laid the foundation for later transitions to fully synthetic materials.

Technological Advancements and Regulations

In the , competitive swimwear underwent a pivotal shift with the introduction of , a synthetic fabric that offered superior strength, smoothness, and reduced drag compared to earlier wool-based materials. 's hydrophobic properties also enabled faster drying times, enhancing post-swim recovery and maintenance. Complementing this, Lastex—a —was incorporated to provide enhanced elasticity, allowing suits to fit more snugly and conform to the body during strokes without restricting movement. These innovations, pioneered by brands like , laid the groundwork for modern performance-oriented designs by prioritizing hydrodynamics and durability. By the 1970s, further material advancements emerged with blends, which significantly reduced water absorption relative to alone, keeping suits lighter in the water and accelerating dry-out periods. This reduction in saturation— absorbs only about 0.4% of its weight in —minimized added resistance and fatigue during prolonged sessions. Often combined with elastane (), these blends improved stretch and compression, optimizing muscle support while maintaining a streamlined profile. Such developments marked a transition toward suits engineered for both competitive edge and practical use, influencing designs through the late 20th century. A landmark in swimwear technology arrived in 2000 with Speedo's Fastskin suit, biomimetically designed to emulate shark skin's ribbed texture for drag reduction of up to 4% through micro-vortices that channel water flow. Within months of its launch, the suit facilitated 21 world records, demonstrating its impact on elite performance. This momentum peaked at the 2008 Beijing Olympics, where full-body versions incorporating panels—offering and compression—enabled 23 of 25 world records broken, primarily by athletes like wearing the variant. The proliferation of these non-fabric suits ignited controversies over equity, as their air-trapping and hydrodynamic properties provided disproportionate advantages, prompting debates on the essence of swimming as a human-powered . In response, the Fédération Internationale de Natation (FINA) enacted stringent rules in July 2009, effective January 2010, prohibiting suits with more than minimal non- components like or panels. The regulations mandated that all competitive swimwear be constructed from permeable materials, limited effects, and confined coverage to non-full-body designs, restoring emphasis on swimmer over technological aids. This ban, upheld through subsequent approvals, curbed the "supersuit era" while allowing limited non- elements for seams to ensure functionality.

Materials and Design

Fabric Composition

Modern competitive swimwear primarily utilizes nylon-spandex blends, typically in an 80/20 ratio, to provide essential elasticity and compression that support muscle alignment and reduce loss during strokes. This composition allows the fabric to stretch up to 40-60% while maintaining over 95% elastic recovery after repeated cycles, ensuring durability in chlorinated environments. offers quick-drying properties and abrasion resistance, while enhances form-fitting compression without restricting movement. Hydrophobic coatings, often silicone-based, are applied to these textiles to enhance water repellency, thereby minimizing surface drag through reduced water . Such treatments can lower drag forces by approximately 1.5% at key angles of attack, contributing to smoother hydrodynamic flow over the swimmer's body. These coatings are integrated during manufacturing to maintain fabric while optimizing performance. Post-2020 eco-innovations have shifted toward sustainable materials, including recycled polyester derived from GRS-certified sources, which verifies content and environmental compliance in swimwear production. For instance, brands like incorporate GRS-certified recycled in blends such as Ocean Flex, reducing reliance on virgin petroleum-based fibers. Complementing this, bio-based elastane, produced from renewable resources like corn-derived ingredients, lowers the of elastane production by up to 44% compared to traditional petroleum-based variants. World Aquatics regulations require that swimwear fabrics have air permeability greater than 80 L/m²/s when stretched by 25%, to prohibit air entrapment that could provide advantages. Only woven or knitted structures are permitted, ensuring compliance through layered material assessments that measure combined permeability. Representative examples illustrate these standards in practice. Modern tech suits like the LZR Pure series employ a 100% textile composition of nylon-elastane, bonded ultrasonically for seamless performance. Similarly, Arena's Powerskin series features carbon fiber-infused s in its lining, strategically placed for muscle activation and compression while adhering to post-ban textile-only rules through adapted woven structures.

Construction and Performance Features

Competitive swimwear is engineered with advanced construction techniques to enhance hydrodynamic , focusing on seamless integration of structural elements that minimize water resistance and optimize swimmer . Ultrasonic bonding, a heat-fusion method that welds fabric layers without threads, creates smooth, impermeable seams that reduce drag by eliminating protrusions and enhancing water repellency. This technique has been shown to lower drag coefficients by 6-10% compared to traditional stitched designs, allowing for smoother passage through water. Complementing this, flatlock stitching lays seams flat against the skin, preventing chafing and further minimizing turbulence, which contributes to overall drag reduction in high-performance suits. Targeted compression zones, achieved through strategic paneling and varying fabric densities, provide muscle support during , stabilizing core and limb movements to improve . These zones reduce muscle oscillation by up to 15%, enabling swimmers to maintain form and potentially enhance stroke by 3-5% through decreased expenditure on unnecessary vibrations. Strategic layering with up to two fabrics in areas like the and hips provides targeted compression to support muscle alignment and improve hydrodynamic positioning, aiding a more horizontal body alignment without providing advantages. This layering enhances by improving glide and overall hydrodynamic profile without adding bulk. Durability is bolstered by integrating UV protection and anti-microbial treatments directly into the construction process, often through fabric coatings that shield against sun degradation and . These features extend suit lifespan, with some treatments maintaining efficacy for up to 50 washes, ensuring consistent performance in chlorinated environments. Representative designs illustrate these principles: racerback configurations distribute shoulder tension evenly across the upper back, reducing strain and allowing fuller arm extension for powerful strokes. Similarly, jammer lengths for men optimize leg coverage to mid-thigh, compressing while streamlining the lower body to cut drag and enhance kick efficiency.

Competition Suits

Tech Suits

Tech suits, also known as technical or performance suits, are advanced swimwear designed to enhance competitive performance through reduced drag, increased , and muscle compression. These suits represent the pinnacle of swimwear , utilizing engineered fabrics that conform tightly to the body to optimize hydrodynamics. Historically and currently, they have been pivotal in elite competitions, though their design and materials have evolved due to regulatory changes. Bodyskins provided full-body coverage from the neck to the ankles or toes, enveloping the swimmer in a seamless, second-skin layer to minimize resistance. Introduced in the late 2000s, these suits, such as the LZR Racer, incorporated non-textile elements like panels that trapped air for and reduced drag by 10-15%. However, bodyskins were banned by (formerly FINA) effective January 1, 2010, due to concerns over fairness and excessive performance enhancement from non-textile materials. In the post-ban era, kneeskins have become the standard for maximum legal coverage, extending from the shoulders to the knees to provide targeted compression and streamlining. These suits comply with current rules limiting coverage to textile-based materials and specific body areas, offering a 4.4-6.2% reduction in drag through hydrophobic fabrics and compressive panels that stabilize muscles and improve . The compression effect enhances blood flow and reduces energy expenditure by 4.5-5.5%, contributing to overall speed gains of approximately 3-4% in races. Legskins, primarily designed for women, feature a high-cut leg opening that balances moderate coverage with enhanced mobility, allowing greater freedom in leg kicks while still providing core compression. This design adheres to ' textile-only mandates and is favored for its ergonomic fit in events requiring explosive power. Tech suits are predominantly worn by elite swimmers in major international events, such as the Olympics, for distances over 50 meters, where sustained performance benefits are most pronounced. All approved tech suits must display the official approval logo, verifying compliance with buoyancy, permeability, and material standards after rigorous testing. Studies, including analyses of 100-meter freestyle times, demonstrate that tech suits yield 2-3% improvements in race duration compared to standard training suits, equating to roughly 1 second for elite athletes. While polyurethane elements in earlier tech suits were instrumental in record-breaking performances, their prohibition shifted focus to textile innovations like carbon fiber weaves for compression without buoyancy aids.

Traditional Suits

Traditional suits in competitive swimming refer to minimal-coverage garments designed for regulation compliance and basic performance, prioritizing modest coverage, freedom of movement, and reduced drag without advanced technological features. These suits are constructed from permeable textile materials such as nylon, Lycra, or polyester blends, ensuring they remain lightweight and quick-drying while adhering to strict buoyancy and permeability standards. Unlike high-performance tech suits, traditional options focus on simplicity and universality across events, serving as the baseline attire for swimmers at all levels of competition. For men, traditional suits include , which are low-cut designs covering from the genitals to the upper thigh, providing minimal fabric for reduced water resistance and often preferred in sprint events due to their streamlined fit. Jammers extend to knee-length, offering greater while maintaining a form-fitting profile that provides slight muscle support and compression without exceeding regulatory limits. Square cuts represent a hybrid style, reaching mid-thigh for a balance between the brevity of briefs and the coverage of jammers, allowing for comfortable movement in longer-distance races. These men's options must not extend above the or below the knee, ensuring compliance with coverage rules that promote fairness and safety. Women's traditional suits typically feature the racerback style, a one-piece with a low-cut back that enhances arm freedom and shoulder mobility by utilizing Y-shaped straps that distribute tension across the upper body. This configuration covers the from the shoulders to the thighs, providing essential support while minimizing restrictions during . Racerback suits are engineered for hydrodynamic efficiency, with seams and fabrics that hug the body without adding bulk, and they must not cover the neck, extend past the shoulders, or go below the knee to meet standards. Under World regulations, all suits—including traditional and approved tech suits—must comply with standards for pool and open water events. Traditional suits provide the non-technical baseline using basic textiles without performance-altering additives beyond regulatory limits. These garments require official , involving material testing for permeability greater than 80 L//second and thickness under 0.8 mm, to verify they consist solely of basic textiles without performance-altering additives. Swimmers must wear only one such suit per event, subject to inspection by technical officials, ensuring equitable conditions across all sanctioned meets and Olympic qualifiers.

Training Suits

Drag Suits

Drag suits are oversized, loose-fitting garments worn over standard training suits during swimming practice to intentionally increase resistance, thereby enhancing strength and . Typically designed as baggy versions of or jammers, they are selected in sizes two to three larger than the swimmer's usual fit to maximize the surface area exposed to flow, creating additional drag through the excess fabric that billows and catches . This design contrasts with fitted practice suits, focusing solely on resistance rather than streamlining or compression. Constructed from non-compressive materials like 100% , drag suits prioritize durability and water permeability to amplify resistance without providing any hydrodynamic benefits. The construction allows water to pass through while the loose fit generates and form drag, making strokes more laborious and forcing swimmers to generate greater propulsive force. Unlike performance-oriented fabrics in suits, these materials are chosen for their ability to remain heavy when wet, further intensifying the training load without restricting movement. In training, drag suits are employed to build power output and aerobic capacity, particularly during high-intensity sets where swimmers maintain technique under added resistance. A study on drag suit over five weeks observed changes in stroke rate and distance per stroke during sprints, suggesting its use in short, high-intensity sets with rest to help maintain technique under resistance. They are commonly used in sets ranging from 50 to 200 meters to target aerobic development, but are removed for speed-focused work to avoid ingraining slower tempos. This practice is prevalent in collegiate and elite programs, where coaches integrate them into maximal yardage sessions to simulate race-like efforts while building endurance. Popular examples include the TYR Poly Mesh Trainer, which uses durable polyester mesh for consistent drag during practice, and the FINIS Ultimate Drag Suit, featuring integrated drag cups that provide adjustable resistance levels based on water capture for varied training intensities.

Practice Suits

Practice suits, also known as training suits, are essential for competitive swimmers during routine, non-competitive sessions, providing comfort and reliability over extended periods in the pool. These suits prioritize everyday functionality over specialized performance enhancements, allowing athletes to focus on technique and endurance without the constraints of race-day gear. Designed as fitted one-piece swimsuits for women or jammers and for men, practice suits feature mid-level coverage to balance mobility and during prolonged . The sleek, body-hugging fit, often with racerback or flyback styles, ensures comfort for hours of repetitive while minimizing irritation. Durability is a core attribute, with chlorine-resistant linings engineered to withstand repeated exposure to pool chemicals; these fabrics can last over 200 hours of use, far exceeding conventional suits by up to 20 times. This resistance stems from specialized coatings and blends that prevent fading, stretching, and breakdown. For gender-specific needs, women's practice suits often include built-in support like thin straps or options for added versatility in team environments, while boys' versions typically use shorts-style jammers for ease during group practices. These suits generally cost between $20 and $50, making them accessible for regular replacement, and require simple maintenance such as immediate rinsing in cool water after each use to remove residue and prevent material degradation. A representative example is the Endurance+ line, constructed from a polyester-PBT blend that offers fade resistance and shape retention for sustained training performance.

Regulations and Controversies

Governing Body Rules

, the international governing body for aquatic sports, establishes the primary standards for competitive swimwear to ensure fairness and safety across global competitions. These rules, outlined in Article SW 7 of the Competition Regulations, mandate that swimwear for pool events must consist of fabrics made from or synthetic yarns using woven, knitted, or braided , with a maximum thickness of 0.8 mm and minimum permeability of 80 L/m²/s at 25% stretch to prevent excessive or drag reduction. Non-permeable elements, such as or full-body molding materials, are prohibited in pool swimwear, limiting any such components to no more than 0.5 Newtons of buoyant force to avoid providing unfair flotation advantages. These material restrictions stem from the 2010 ban on non- suits, emphasizing permeable textiles like or Lycra without treatments that seal the fabric mesh. Coverage requirements are strictly defined to maintain modesty and equity: for men, suits must extend from the navel to the knee without covering the neck or exceeding the shoulders, limited to a maximum of 9 seams above the crotch and 4 seams per leg below; for women, suits must cover from the shoulders to the knee without neck coverage or extension past the ankles, limited to a maximum of 11 seams above the crotch and 4 seams per leg below. No more than two layers of fabric are permitted, measured collectively for thickness and permeability, though a third layer is allowed for women's period-proof suits limited to the groin area (maximum 150 mm front and 100 mm rear, including seams, with 2.5 mm thickness). Full-body suits exceeding these coverage limits are banned, including in relay events where standard pool rules apply without exceptions for team formats. All swimwear must undergo ' approval process, requiring manufacturers to submit an online application with technical sketches, fabric samples (minimum 1 m² per material), and fees starting at 375 EUR per fabric type, at least 30 days before competition use. Approved suits are tested by Swimwear Expert for compliance with (limited to 0.5 N), drag (via permeability metrics), thickness, and overall performance neutrality, ensuring no aids to speed, endurance, or flotation. Tech suits, defined as those with construction elements such as bonded or taped seams, multiple fabric layers, or strategic elastane placement exceeding specified widths per criteria, require a visible homologation label ( logo) affixed to the garment for verification. National federations, such as , align with these standards but impose additional event-specific restrictions; for instance, tech suits are permitted only for athletes aged 12 and older in sanctioned meets, with 12 & under competitors limited to traditional suits lacking FINA/ approval labels. Enforcement occurs through pre-race inspections at major events like the Olympics and , where referees and call room supervisors verify compliance, potentially disqualifying non-conforming athletes and withdrawing approvals for violations. Post-race checks may also analyze suits for technical advantages, upholding the integrity of records and results.

Bans and Recent Updates

In 2020, introduced a prohibition on technical suits for athletes aged 12 and under at all sanctioned, approved, or observed meets, with limited exceptions for junior nationals and higher-level international events. This measure seeks to foster skill development and technique among young swimmers by minimizing dependence on advanced equipment, while also addressing concerns over cost and accessibility in age-group competitions. The 2010 ban by FINA (now ) on non-textile, polyurethane-based suits marked a pivotal pre-2020 shift, leading to a sharp decline in progressions; annual record breaks dropped to single digits post-ban, compared to 140 shattered in the 2008–2009 "super suit" era. During the 2024 Paris Olympics, rigorously enforced swimwear standards, including textile-only construction, maximum coverage limits (waist-to-knee for men, shoulder-to-knee for women), and prohibitions on buoyant or thickness-exceeding materials, to uphold competitive equity amid heightened scrutiny. That year also saw controversies surrounding gender-specific uniform designs in , including , with critics arguing that restrictive attire rules perpetuate inequality and limit inclusivity for non-binary and athletes. By 2025, World Aquatics mandated sample submissions from manufacturers—one per model and at least 1 m² of fabric—for independent verification of colors, materials, and compliance, streamlining approvals while emphasizing regulatory oversight. A broader industry shift toward sustainable textiles in competitive swimwear has contributed to environmental gains, with eco-friendly production methods reducing fabric waste by up to 25% in some cases through recycled materials and minimized offcuts.

Body Image and Psychological Concerns

Competitive swimsuits, particularly tech suits, are tightly compressive and form-fitting to reduce drag and enhance performance, but this design can cause physical discomfort, including restricted movement and, in some cases, breathing difficulties due to torso compression. The revealing nature of these suits has raised significant concerns regarding psychological effects on female swimmers. The suits accentuate body form, potentially increasing external perceptions of sexual attractiveness while promoting objectification. Research has shown that wearing swimsuits can induce higher levels of state self-objectification in women, leading to increased body shame, appearance anxiety, and body dissatisfaction. In competitive swimming, female athletes often feel "on display" in these tight and revealing garments, which can heighten self-consciousness, encourage social comparisons, and elevate risks of disordered eating. The sport's image-focused environment, combined with small and revealing swimsuits, has been identified as a contributing factor to high rates of eating disorders among aquatic athletes, with prevalence of disordered eating behaviors reported up to 45% in female aquatic athletes. Swimmers have described the psychological challenges of being "basically half-naked" in their suits throughout their careers, contributing to body image struggles and, in extreme cases, eating disorders. Such objectification can harm self-perception and confidence among female competitors.

Accessories

Swim Caps

Swim caps are essential accessories in competitive , primarily designed to cover the swimmer's and streamline the head's profile to minimize resistance. By compressing and creating a smoother surface, these caps reduce drag forces acting on the swimmer's body, allowing for more efficient through the . In professional and elite competitions, swim caps are widely used to enhance hydrodynamic performance, particularly during starts, turns, and straight-line where every fraction of a second counts. The two primary materials for competitive swim caps are and , each offering distinct advantages and trade-offs. caps are favored for their superior durability and properties, making them suitable for swimmers with sensitive skin or latex allergies; they are thicker, more resistant to tearing, and can last for several months of regular use, often enduring multiple training sessions and races without significant degradation. In contrast, caps provide a tighter, more flexible fit that enhances streamlining but are less durable, prone to tears, and carry a higher risk of allergic reactions due to their composition. Design features of swim caps emphasize and customization to optimize . Many competitive caps feature a tapered or dome-shaped profile that aligns with the swimmer's head contours, reducing and frontal drag by approximately 5-10% compared to bare heads or standard caps, as demonstrated in biomechanical studies. These designs streamline water flow over the head, contributing to overall speed gains in races. Additionally, caps are often custom-printed with team logos, sponsor names, or national flags, adhering to size limits for visibility while maintaining a sleek appearance. In competitive swimming, swim caps are typically required by pool facilities and meet organizers to prevent loose hair from causing additional drag and to protect swimmers' hair from damage. They are especially preferred in sprint events, where maximizing is critical for short, high-intensity efforts, allowing swimmers to achieve faster times by minimizing resistance. While not universally mandated by governing bodies for all events, their use is standard practice to ensure fair and efficient competition. Regulations for swim caps, governed by (formerly FINA), prohibit any modifications that could alter buoyancy, provide unfair speed advantages, or incorporate performance-enhancing elements such as electronics that aid propulsion or endurance. Caps must comply with rules limiting logos and branding to specific sizes—such as one manufacturer up to 20 square centimeters on the front—to maintain uniformity. Caps containing embedded electronics for non-timing purposes remain banned if they confer an advantage, though for data collection was permitted starting in 2023 under strict oversight. Recent innovations in swim caps have focused on enhancing comfort and fit without compromising performance, such as internal grip textures in silicone models to prevent slippage during vigorous strokes. While integrated anti-fog features are more common in goggles, some 2023 product lines introduced combined cap-and-goggle sets with advanced coatings for clearer vision, though caps themselves prioritize hydrodynamic shapes over optical enhancements.

Goggles and Other Gear

In competitive swimming, goggles are essential for maintaining clear underwater visibility and protecting the eyes from chlorine and other irritants. Modern competition goggles typically feature polycarbonate lenses, which are shatter-resistant and lightweight, often treated with anti-fog coatings to prevent condensation buildup during intense races. These lenses are usually equipped with adjustable double straps made from silicone or elastic materials for a secure, customizable fit that minimizes drag. For outdoor events, many models incorporate UV protection to shield swimmers' eyes from harmful sunlight exposure, reducing glare and potential long-term damage. Nose clips, commonly used to prevent water from entering the nasal passages during turns or breathing phases, are predominantly made from soft in a pinch-style that gently compresses the nostrils without causing discomfort. This construction allows for a low-profile fit that adheres securely via friction, avoiding slippage in high-speed swims. In breaststroke events, where swimmers exhale through the mouth and may inadvertently inhale water during the head-up breathing motion, nose clips are particularly favored by specialists to maintain focus and streamline exhalation. Ear plugs serve as a protective accessory against water ingress, which can lead to infections like swimmer's ear, and are often designed with vents to equalize pressure changes during dives or turns without fully muffling ambient sounds like stroke cues from coaches. Vented models, typically constructed from or materials, feature filters or channels that block while permitting airflow, ensuring swimmers retain directional hearing essential for competitive pacing. Under World Aquatics regulations, , nose clips, and ear plugs are permitted in competitive provided they do not incorporate performance-enhancing technologies such as embedded sensors or hydrodynamic modifications that alter or speed. Custom-fitted versions must be pre-approved by meet officials to ensure compliance with and fairness standards, though standard off-the-shelf models are routinely allowed without additional scrutiny. Overall, are universally essential for visibility in chlorinated pools and open water, enabling precise navigation and stroke timing, while nose clips and ear plugs are optional but commonly employed by athletes prone to sinus or ear issues, with breaststroke competitors showing higher adoption rates for clips to optimize efficiency.

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