Optimal walking support to protect your knee joints. When your heel meets the ground, a portion of the fins on the screw section bend in response to your body's weight,rotating the front tip of your foot slightly outward as you step down.This assists the rotational motion of the knee and promotes correct walking form. Structural design facilitating dispersal and absorption of impact shock on the knees. The shock of impact generated when the heel hits the ground puts stress on the knees. Our SHM design includes flexible, elastic rubber to absorb the shock of impact, and the screw-structure design disperses the downward force produced by bodily weight to efficiently reduce stress on the body. Utilization of inner -leg muscles to stabilize the knees.