100% Polyester Imported Hand Wash Only Fabric: 50% Polyester/50% PBT Super Pro Back features wide straps for superior support and comfort Engineered from our exclusive, longest lasting and best-selling Endurance+ fabric 100% chlorine resistant fabric designed to lasts 20 times longer than conventional swimwear fabrics Four-Way Stretch technology providing a body-hugging fit, great shape retention and soft comfort