The Sladen Suit was a heavy type of British divers' drysuit made by Siebe Gorman. It is entered by a wide rubber tube at the waist: this tube is folded and tied off before the diver dives. It was used by British manned torpedo riders and for general underwater work.^{[citation needed]}

It was sometimes nicknamed "Clammy Death".

The first model had two small glazed viewports. It was redesigned with the single oval flip-up viewport so the wearer could get binoculars to his eyes.^{[citation needed]}

There was an oxygen rebreather called the "Universal" that was designed to be used with it. The Universal was a long-dive derivative of the Davis Submerged Escape Apparatus.^{[citation needed]}