The 1 piece suit provides full body protection from cold, sun and marine stingers. It can be used under an existing wetsuit for extra warmth or can completely replace your wetsuit in warmer waters. It is less buoyant than neoprene so you need less weight, making you more comfortable when snorkeling or diving. Sharkskin Chillproof is an aquatic specific, windproof 3-layer composite material that has been developed for water sports athletes.