Nightwear

Nightwear – also called sleepwear, or nightclothes – is clothing designed to be worn while sleeping. The style of nightwear worn may vary with the seasons, with warmer styles being worn in colder conditions and vice versa. Some styles or materials are selected to be visually appealing or erotic in addition to their functional purposes.

Nightwear includes:

Other types of garment commonly worn for sleeping—but not exclusively so— include gym shorts, t-shirts, tank tops, sweatpants, as well as underwear and/or socks (worn without outerwear). Sleeping in the nude is also common, especially in warmer climates.

According to a 2004 United States survey, 13% of men wear pajamas or nightgowns for sleeping, whereas 31% wear underwear and another 31% sleep nude. Among women, 55% wear pajamas or nightgowns, which were counted under the same option:

A survey by the BBC The Clothes Show Magazine in 1996 revealed the following about sleepwear in the UK:

†Most common response in 'Other' from women was outdoor clothes, from men shorts.

On 22 December 2011, the U.S. Consumer Product Safety Commission (CPSC) issued a letter to manufacturers, distributors, importers and retailers reminding the apparel industry of the enforcement policy and their obligations associated with children's sleepwear and loungewear.

The commission's regulations define the term children's sleepwear to include any product of wearing apparel (in sizes 0–14), such as nightgowns, pajamas, or similar or related items, such as robes, intended to be worn primarily for sleeping or activities related to sleeping, except: (1) diapers and underwear; (2) infant garments, sized for a child nine months of age or younger; and (3) tight-fitting garments that meet specific maximum dimensions.