Ouber Men's Bodybuilding Workout Gym Running Tight Quick Dry Beach Shorts Pants Imported 84% Cotton, 16% Polyester Hand wash ONLY,slightly,cold water The size for all underwear products are asian size. Please pay a attention before you make order. If you shopping the underwear from U.S.A or EU brands,should be choice one size up. Comfortable and sexy Suitable for any circumstance, when walking, running, in the beach or at home,etc.