Penn State Men's Cycling Shorts POLY-LYCRA_: 80% polyester and 20% Lycra (spandex) Specially knitted for dye sublimation printing to achieve brilliant colors COOL-SOFT_ high density foam chamois: soft, flexible, breathable and comfortable Silicone grippers in the legs helps keep the shorts in place. Dye sublimation for sharp, long lasting, fade resistant designs!