Main Materials: Polyethylene plastic, Nylon straps, Biofoam padding. Perforated plastic shells for ventilation and impact resistance. High density foam padding for superior quality and comfort. Open mesh lining material for improved ventilation. TPR graphic for unique styling. Side and top gussets help pad conform to elbow shape. Stretch sleeve with open center to prevent binding and promote cooling. Lightweight and flexible design. Designed to meet CE1621 Standards.