The ZK-1 Knee Brace from Zamst is a knee brace designed to relieve pain associated with wiper syndrome and internal knee tension.The RK-1 knee brace has resin springs to keep your knee supported without compromising your running. The spiral strap prevents the knee brace from slipping off and also keeps the leg in alignment by preventing friction. For optimal comfort, your knees will stay dry throughout your activity thanks to its evacuating and breathable material.In addition to achieving great movement, the lightweight three-dimensional cut of the RK-1 fits your knees perfectly.