Donut shaped silicone pad combined with close circle high-density knitted fabric improve patella stability. Bilateral spiral stays enhance knee support from shifting stress, thus prevent sprain or strain injuries. Double c pattern stable contoured structure beside knee cap enhances joint stability. Y pattern magic power band preserves energy consumption when knee joint flexed, and enhances sports explosion when it extends. Loosely knitted fabric over popliteal fossa ensures comfort without restricting motion. Durable fitting base with high permeability fabric ensures wearing durability and breathable.