SIIKWORLD Mesh Convex Pouch Boxer Brief Pack of 6 87% Nylon , 13% Spandex Because of the Asian size is about 1 size smaller than US size.For example: usually the Asian M is equal to the US S, and our item tag is printed in Asian size only.When you receive the item,please feel ok, it is just your size 87% Nylon , 13% Spandex Great value! Affordable 6 color / pack, Comfortable, Good Elasticity Perfect clipping makes it nice and breathable to wear Soft material that makes you feel very comfortable