4-Way stretch Cordura® offers unrestricted movement throughout pant. Perforated 450D front panel & back yoke panel for additional ventilation. Solid 600D back thigh and saddle panel for superior abrasion resistance. Ultralight mesh vented back calf & ankle paneling improves boot airflow. Mini mesh front thigh & inner back yoke inserts. Interior silicone gripper. Double & triple stitched seams reinforced with high strength nylon yarns. Large high heat/abrasion resistant full grain leather inner knee paneling. Durable yet pliable TPR embellishments on thighs, knees and back yoke. Silky soft 3/4 length inner lining for comfort and knee brace optimization. Front zipper closure with adjust ratchet strap & side waistband adjustors. Removable / interchangeable front thigh patch. Back yoke TPR locker tab. Slim athletic racing fit; this is our slimmest and tightest fitting pant style. 58% Polyester/37% Nylon/5% Spandex. Fully dyed for long lasting color.