Product Review

This sandal features Ryn Open Air Tunnel technology for a softer ride. It provides the cushioning you want, and the stability you need. As the foot strikes the heel, mid-foot, and toe-off on Ryn's seven layer sandwich structure, its EVA embedded graphite shank see-saws on the Ryn Air Tunnel, thus recreating the stable natural foot strike environment humans were evolved to follow. As a direct result of this guided motion, Ryn footwear reduces stress on the back, hips, knees, and ankles; strengthens and tones the core, glutes, thighs, calves, and back muscles; aligns the body; stimulates the arch and enhances blood circulation; stabilizes and guides the foot strike and promotes energy return.