SEOBEAN Mens Low Rise Sexy Sport Swimwear Trunk Boxer Brief Bikini Swimsuit 82% Nylon,18% Polyurethane hand wash ONLY,slightly,cold water The size for all swimwear products are asian size. Please pay a attention before you make order. If you shopping the swimwear from U.S.A or EU brands,should be choice one size up. Comfortable and sexy Low rise, falls below the natural waistline