Universal Textiles Mens Button Fly Boxers With Elasticated Waistband (Pack Of 6) 100% Polyester Button closure Buy 6 and get a discount. Mens soft ribbed cotton boxer shorts with button fly. Comfort fit elasticated waistband. Please note that colors may vary slightly from those shown. Fiber contents 100% Cotton for white and 35% cotton and 65% Polyester for other colors.