WUAMBO Men's Compression Speed Short Solid Jammer Material:84% polyester/16% Spandex Which made of long-wearing,breathable and comfortable polyester Speed dry,compression,stretch and recovery properties Front lined with soft lining, elastic waist assure maximum comfort and performance Ideal for the swimmers,triathletes,water enthusiasts,exercise and fitness Asia Size is smaller than US size,please pay a attention before you make order. e.g.,US XS/Asian Tag L