Speedo Men's Endurance+ Launch Splice Jammer Swimsuit 50% Polyester/50% PBT Imported Engineered from our exclusive, longest lasting and best-selling Endurance+ fabric 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 Non-slip drawstring at waist