Speedo Big Boys' Youth Color Stroke Jammer Swimsuit 50% Polyester/50% Polyester Speedo exclusive Endurance+ is our longest lasting and best selling fabric to give you more value for your money Resists bagging, sagging, and the effects of suntan lotion, skin oils, and chlorine Drawstring inner waist for secure fit and adjustment Jammer styling provides more coverage with UV sun protection and adds compression to reduce fatigue Made by Speedo, the world's #1 swim brand