The Nike Air Zoom Structure Triax+ 12 running shoe offers a superb mix of stability, cushioning and flexibility. Breathable sandwich mesh upper with supportive overlays and welds provides a secure, lightweight fit. Firm heel counter adds pronation control. Zoom Air™ in the heel and forefoot combine with a dual-density, decoupled Crash Pad, supportive footbridge and flexible forefoot for a smooth ride. Large Duralon™ insert offers outstanding cushioning, longevity and traction. Asymmetrical arch gives support and sufficient torsion. BRS 1000™ carbon rubber heel. Wt. 10.2 oz.