Sexy Mens Underwear Breathe Soft Bamboo Fiber Bikinis Briefs HS105 Because the size is small than usual,Recommend you guys to go One size up 95 %Bamboo fiber +5% Spandex Seamless technology construction and fabric Constructed with soft, stretchy and breathable bamboo fiber, keeps you comfortable and sexy all day Good quality Modal fabric,durable ,soft, breathable and comfortable.