WOWHOM Men's Bikini Briefs Sport Underwear 9017 Size(inch): S: 26"-29''stretch, M: 28"-32''stretch, L: 31"-36''stretch, Material: 85% Nylon+ 15% spandex. Smooth and soft nylon fabric, suitable for sport. Low waist is designed, flexibility is good, comfortable pouch, Very fashionable. Sport underwear's microfiber fabric wicks away moisture, keeping you cool and dry.