The Nike Air Max 2009 running shoe features a two-layer mesh upper. Top layer mesh features Flywire technology and a sub layer open mesh offers breathability and comfort. Full-length Air-Sole unit provides durable cushioning. Innovative forefoot flexibility gives a more natural feel while running. BRS 1000 carbon rubber outsole adds durability and traction on a variety of surfaces. Nike+ enabled. Wt. 13.0 oz.