what is the purpose of a wet suit
Diving suit Wetsuits are relatively inexpensive, simple, expanded neoprene suits that are typically used where the water temperature is between 10 and 25 °C (50 and 77 °F). The foamed neoprene of the suit thermally insulates the wearer.[7][8] Although water can enter the suit, a close fitting suit prevents excessive heat loss because little of the water warmed inside the suit escapes from the suit to be replaced by cold water, a process referred to as "flushing".
Terrycloth Items that may be made from terrycloth include babies' reusable nappies (UK English) or diapers (US English), towels, bathrobes, bedlinen, and sweatbands for the wrist or head. Terrycloth is also sometimes used to make sweat jackets. Terry towelling hats with a shallow brim were once popular with cricketers (like English wicketkeeper Jack Russell), but are no longer in fashion.