Smartwool Men's PhD Seamless 9" Boxer Brief 72% Merino Wool, 22% Nylon, 6% Elastane Knit in Turkey Slim Fit; Mid Rise Performance waistband provides snug, comfortable fit Varied knit textures for ventilation in high heat and sweat zones Knit-in graphic - Size M/Inseam: 9" (23 cm) Style:SW016003