Get level 3 maximum protection on this professional quality mcdavid knee brace with dual disk hinges designed for preventing injuries and helping those recovering from mcl and acl injuries this knee brace has polycentric hinges with hyperextension stops that provide more support than simple braces wider hinge paddles offer better support the padded buttress supports the patella and bound edges prevent irritation there are top and bottom hook and loop closures for a secure fit for both left