SZHOWORLD&reg; CoolChange Double spring Open Patella Knee Brace and Support Double spring Open Patella Knee Brace Support, Comfortable, reinforcement, support. spring support alleviate the impact,maximum protection of your knees. Opening EVA gasket design, stability of the knee joint, decomposition pressure, breathable and comfortable Adjustable type three beam straps,tightness can be adjusted according to individual needs, be fixed firmly. Fits knee sizes up to 23.5 inches in circumference. Helps support and stabilize injured, weak or arthritic knees during occupational and sporting activities