Funme Men's Underwear Jockstrap Briefs 8% spandex Material: 95% Cotton + 5% Spandex Color:As pictures show About Size : XS: 27.16-30inch; S: 30-31.89inch; M: 31.89-35.03inch; L: 35.03-37.80inch. Machine Wash Open back design is sexy and fashionable, Better attract the attention of your lover, makes you more hot and sex. Great for daily wear or gym, running, athletic supporter