There are five main types of ambient pressure diving suits; dive skins, wetsuits and their derivative semi-dry suit and hot-water suits, and dry suits.[6] Apart from hot water suits, these types of suit are not exclusively used by divers but are often used for thermal protection by people engaged in other water sports activities such as surfing, sailing, powerboating, windsurfing, kite surfing, waterskiing, caving and swimming.