The Gripper™ Hinged Knee Brace provides medial and lateral stability and resists distal migration due to an internal SkinLoc™ pad that works in concert with the outer closure strap to grip the proximal end of the calf muscle. Hinge pockets are reinforced in the center and at either end with ballistic nylon material to enhance durability. Wraparound anterior closure allows for ease of application and an optimum fit. The Gripper is available in three different models: Neoprene 1/8", Neoprene 3/16", and CoolFlex™. The neoprene version provides warmth and superior compression, while the CoolFlex version is breathable and hypoallergenic. Hinges are single axis aluminum. To size correctly, measure the circumference of the knee at mid patella (knee cap).