Super Durable 1200 Denier Nylon outer skin.; Comfortable 12mm EVA Foam padding.; High-impact PP protective splint.; Adjustable velcro straps. * Approximate Sizing:4" 6" or under = XS; 4"6" - 5" = S; 5" - 5"6" = M; 5"7" - 6" = L; 6"+ = XL * Pads should fit tight and not move around during a fall. * Super Durable 1200 Denier Nylon outer skin; Comfortable 12mm EVA Foam padding; High-impact PP protective splint; Adjustable velcro straps. * Sizing Chart: XSmall = under 4"6 inches; Small = 4" 6 inches - 5"; Medium = 5" - 5"6 inches; Large = 5"7 inches - 6"; XLarge = 6"+