Features Perforated Airprene chassis for support & secure fit Impact resistant, polyethylene knee cap Dual pivot system mimics anatomical action of the knee Inverted post latching system Adjustable hook & loop closure strap Asymmetrical design for comfort & fit S/M fits most riders up to 5’7” ft. (170 cm) tall L/XL fits most riders taller than 5’7” (170 cm) 2XL/3XL fits most riders taller than 5’7” (170 cm) with larger than average legs