Fashion Sports Underwear Low Waist Swim Briefs for Men B1129 Machine washable, dry naturally Size(inch): S: 26"-29''stretch, M: 28"-32''stretch, L: 30"-35''stretch, XL:32"-38''stretch NOTE: --------- this is the size of Asia. Please choose your suitable size according to the above size. Material: 80% Nylon+ 20% spandex Smooth the nylon fabric of high quality, good elasticity, is a very good sports underwear. Fashionable, tight design, have very good shape body effect!