35% Ethylene Vinyl Acetate, 30% Acrylonitrile Butadiene Styrene, 20% Polyester, 10% Polyurethane, 5% Nylon Imported Variable Axis Hinge allows knee cap to flow up and down independently for increased range of motion Replaceable hook and loop closure system allows for fit adjustment Fully vented knee and shin with nested D3O armor dampening Injection molded plastics for comfort and safety Compression molded liner for superior comfort