Light weight, rigid carbon composite frames offering excellent protection and tibia capture ? Anatomical form leads to a snug fit ? Articulated Patella System offers excellent impact protection for the knee cap (patella system can be removed for activities not requiring the need for a patella system) ? Hinge motion mimics natural motion of the knee joint ? Variety of extension stops to limit extension ? Semi rigid lateral cuffs with soft touch over-molding for comfort. Nonelastic straps and condyle support offer medial-lateral stability ? Static non-slip suspension via 4 straps ? Quick disconnect lateral buckles for easy fitting and removal ? Twill carbon look with glossy finish ? 4 off-the-shelf sizes to fit wide range of leg sizes ? Total weight (single 745g) ? Knee sleeve included and available as spare part. ? Included on the B2 box and available as spare part. ? 1 sleeve fits either leg ? Sold individually.