Grade 5 quality Impact Protection ? External Lightweight Cane & Foam rods Three Piece Knee Roll with ergonomic Bolsters provides enhanced shape retention Impact Protection ? Internal Duo Flex Knee Roll – Cotton faced Tri-Flex Integral Shin Bolster ? Cotton faced Additional Features Durable ?Tough Scuff? Instep Facing ?Grain? PVC Straps; 50mm Calf & 25mm Thigh & Ankle with 25mm Hook & Loop