Features Perforated Airprene chassis for support and secure fit Impact resistant, polyethylene knee cap Dual pivot system mimics anatomical action of the knee Inverted post latching system Adjustable hook and loop closure strap Asymmetrical design for comfort and 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