As part of our most stable line of sport performance bracing products, the BIONIC FULLSTOP provides the ultimate in Anterior Cruciate Ligament (ACL) protection during recovery from injury, as well as prevention of future injury. FULLSTOP dampening hinges prevent hyperextension and ...As part of our most stable line of sport performance bracing products, the BIONIC FULLSTOP provides the ultimate in Anterior Cruciate Ligament (ACL) protection during recovery from injury, as well as prevention of future injury. FULLSTOP dampening hinges prevent hyperextension and help improve joint mechanics in both surgical and non-surgical knees.