The all-new 2021 FXD LS.1 lightweight 4-way stretch work short Black features a ground-up FXD developed and tested 4-way stretch polyester 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.