Neleus Men's Compression Square Leg Swimsuit Shell: 80% Nylon / 20% spandex, Lining:100% Polyester Elastic closure Hand wash cold water Direct from manufacturer Elastic waist band for extra comfort and support water repellent technology dries fast and resists fading Because of the Asian size is about 2 or 3 size smaller than US size. For example: usually the Asian Tags "L" is equal to the US Size "Small"and our item tag is printed in Asian size only. When you receive the item,please feel ok, it is just your size