Pierre Roche Mens Button Fly Boxer Shorts Underwear (Pack of 2) Cotton, Elastane, Button closure Elasticated waistband. Branded waistband. Two button front. Size (to fit)- S: 30-32 inch, M: 33-35 inch, L: 36-38 inch, XL: 39-41 inch. 95% Cotton 5% Elastane.