Skinsuits can be worn as a separate or layered with your wetsuit. They lycra skin suits are often used to help get in and out of wetsuits quickly and so that you have a garment under your suit when changing, they also help protect your skin from harmful sun rays and sea life. Polyolefin pieces are worn to add warmth to your wetsuit or also as a separate, they also protect from sea life and sun rays. The lycra and polyolefin pieces come in full length suits as well as in shorts and tops.