The Thor Prime Pro Cast Dirt Bike Pants are packed with features...Specifications Include:In-motion fabric construction provides mobility and durabilityUltra-lightweight pre-curved chassis designKnee panel uses strong synthetic fibers to reduce knee-brace wearPremium grade full grain leather inner knee panelsStrategically placed vented mesh panelsLaser cut holes for ventilationAthletic mesh liner with spandex stretch panelEngineered expansion stretch panels on waistRefined inner waist silicone bandInterior hip pocketRatchet style waist closureRefined side cinch system for precision waist adjustment