Play iBoxer, Play underwear iboxer featuring a pocket to hold your mp3 player (didn't know you needed underwear with such a feature did you! Can also hold you most intimate items.) Button fly play underwear boxer. 93% Cotton 7% Spandex. 013976 play underwear. Manufacturer sizing: Small 28-30", Medium 31-33", Large 34-36", XL 37-39"