Transition wedge allows for a smooth ride. It's been called a lot of things: springy, resilient, bouncy.(www.guccidesigner.com ) But to a runner, the nike shox R4 means one thing: responsive cushioning. The top plate distributes impact forces from the heel to the individual columns, deflecting like a trampoline. The bottom plate supports the columns, producing a secure base to guide your foot through the heel-to-toe transition. The columns control impact by collapsing quickly at first, and then slowly returning to their original height. The transition wedge allows for a smooth ride from the Nike Shox cushioning system in the heel to the Air-Sole unit found in the forefoot. You Are Viewing A Brand New 100% AUTHENTIC Nike Shoes, Please purchase other style Nike shoes in my store. The quality is high and the price is low. All the nike shox r4 flywire for men are high quality and cheap price, safe and free shipping.