New Men's NIKE Set Of 2 Dri Fit Polyester Blend Boxer Briefs Size M. A stretchy, sweat-wicking knit keeps up with you day and night in boxer briefs sporting anti-chafe seams and logo-marked elastic ringing the waist. Pack of two pairs Functional fly Dri-FIT moisture-wicking technology 92% Polyester, 8% Elastane Machine wash, tumble dry.