The Nike Air Structure Triax X running shoe is made for the runner that looks for a shoe to control overpronation and seeks high end comfort and cushioning. Very breathable sandwich mesh upper with supportive overlays. Air-Sole® unit in the heel, Zoom Air™ in the forefoot. Soft Rideliner PU footbed offers longevity. PU Crash Pad provides reduced pronation values, dual-density. Duralon™ in the forefoot and BRS 1000™ in the heel adds fit, feel and durability. Nike+ sensor pocket is located in the arch area to hold the sensor in tightly. Wt. 13.4 oz.