ONEFIT Mens Underwear Bikini Briefs Double Thongs Jockstrap G-String Panties 96%Cotton, 4%Spandex hand wash/machine wash. For your health, please wash separately from other laundry. Sexy mens stretch breathable underwear, front opening and backless design Clearing mite antibacterial effect, good affinity to skin, breathable moisture, not out of shape,Thin elastic waist and leg trim This underwear have carry buttock effect, because of hollow out design and has good permeability, breakthrough embodies the design concept: sex appeal is a kind of attitude