SPEEDO Solid Super Pro Endurance Adult 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. Helps resist sagging and bagging, keeping swimwear fitting newer longer.