FXD WS.1 STRETCH CANVAS WORK SHORTS ARE MADE FROM 8.2 OUNCE (280GSM) ADVANCED COTTON POLYESTER STRETCH CANVAS WITH DURA500™ ADVANCED NYLON AND POLYURETHANE CANVAS ABRASION PANELS. DURA500™ IS A 500 DENIER NYLON OXFORD TREATED WITH POLYURETHANE FOR HIGH TENSILE STRENGTH AND PERFORMANCE DURABILITY. DURA500™ PROVIDES LONG-LASTING ENHANCED TEAR AND ABRASION RESISTANCE.