The AIR MAX 89 uses a large air cushioning unit at the heel which is visible from the side of the midsole in most models.The air cushioning of air max shoes belongs to Nike air cushioning series,which extremely use the air and is the best protect system when the shoes encouter the attack.Because the foot repeatedly attact the groud which will cause great damage for body and sports peformance,while AIR MAX 89 can share the stong impact loaded by athletes,protecting them all considely.