The mcdavid knee brace with polycentric hinges and cross straps is suitable for prevention of and recovery from mcl and acl injuries it boasts level 3 maximum protection and has bi lateral geared polycentric hinges with hyperextension stops ensuring excellent support and allowing you to move freely the professional quality brace offers more comfort thanks to its seamless and perforated back panel as well as 4 elastic crossing straps there is a secure hook and loop closure and a padded buttres