Troy Lee Designs GP Air Factory Men's MX Motorcycle Pants - Black/Red / Size 28 New and improved construction with an athletic fit. Combination 500 denier polyester mesh / 600 denier polyester for maximum ventilation with durability. Velcro side cinch strap system can be adjustable within 2" of tolerance on waist size. Cowhide leather in knee for maximum durability, added grip and heat protection. 2-way spandex in the knee, calf, crotch and rear yoke provide added flexibility.