The WS.1 Original Work Short is made from 8.2 ounce (280gsm) Tensile 280™ cotton canvas with Dura500™ advanced polyester 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.