Outer material made from extremely durable Cordura. Cordura, an extremely abrasion-resistant textile fiber (four times more than regular nylon), makes this product highly resilient for cross-use. Gel lining for shock absorption. Protection provided by an ABS shell on the legs. Protection for the hind legs during cross-use. Standard knee protectors are not sufficient in the cross area; the protection for the hind legs needs to be enhanced. You can combine them with the Cross Antérieur Gamêtres protectors.