The FXD WP-1 Original Cargo Work Pant is made from 8.2 ounce (280 GSM) Tensile280 cotton 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 resistant.