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While the  Cheap nike dunk sb shoes, but the basic principle is generally connected. Its primary function is to absorb the shock from the ground. When people run speed of 6 meters per second, the feet bear the weight of the load is about 4 times, jumping when the increase was 7 times, triple jump two feet directly, and hard collisions, the peak impact force can be weight up to 20 times, a strong oscillation will spread to the ankle, knee, hip, spine and brain which. Thanks to our heels natural fat pad and the "spring system" effectively resist the arch of this injury. Modern sports shoes Cheap dunk sb shoes  will be a kind of high "pressure compliance performance" of the material placed in the heel and let it through their own shock absorption maximum amount of kinetic energy of deformation. Also some sports shoes will be the end result of "waffle" shape, and some placed in the sole and the cushion rubber column, under the chassis to play the role of shock absorber spring.
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