The GP Air race pant is purpose-built to fend off the nastiest heat and humidity. Researched and developed to optimize ventilation, the GP Air pant helps lower body temperatures and minimize fatigue. Ultra-light, highly durable and remarkably comfortable, the GP Air pant is unmatched when it comes to supernatural heat and wilting humidity.- 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.- YKK brand zipper.