Product Review

This shoe features Ryn Encapsulated Air Tunnel Stabilized technology for a stable 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. The Sympatex membrane allows external protection from the cold and wet, and is water resistant and wind proof. It has 100% breathability properties that whisk away internal moisture from feet, and keep feet dry and maintain an optimum foot temperature in line with weather conditions and activity.