Speedo Endurance Leaderback One Piece with; Classic training one piece Front lined for modesty & added comfort Medium leg & medium rear coverage Chlorine resistant Made from Endurance+ fabric This swimsuit is ideal for training and regular pool use. Made from Endurance, an exclusive Speedo fabric designed to last longer, it is 100% chlorine-resistant to prevent snagging and fading 20 times longer than any other swim fabric. This fabric also features 4 way stretch technology for added softness and comfort.