The Nike Air Max Trailbreak trail running shoe provides extra durability on the trail. Mesh and synthetic overlays offer a more durable upper for the dirt and grime of trail running. Heel Air-Sole® unit, forefoot Zoom Air™ unit. Bouncy Cushlon midsole for great plush ride and cushioning. A new trail outsole with a more aggressive Waffle® pattern. Nike+ enabled. Wt. 13.2 oz.