SPEEDO Cosmic Explosion Endurance Axcel Back Youth * Axcel Back styling features sleek, thin straps and an open back. * 100% Chlorine resistant fabric that lasts 20 times longer. * Speedo? Endurance fabric retains color 20 times longer. * Features 4-way stretch technology for a comfortable fit. * Features a softer & lighter fabric than ever before. * Full front liner. * Fabric: Speedo? Endurance // 50% Polyester/50% PBT.