Perfect for training or racing, the TYR Shockwave Splice Swim Jammer is built with Durafast 100% Polyester that use a unique polyester and PBT blend that maintains the perfect fit and retention of traditional Lycra, but lasts twenty times longer. Soft and comfortable, Durafast 100% Polyester is easy on the skin, has minimal moisture absorption and provides unsurpassed sun and chlorine resistance. When it's time to focus and perform, Durafast is a polyester suit that will last practice after practice, race after race.