The Nike Air Max Assail 5 is a cushioned, lightweight men's trail running shoe designed for multisurface use. Durable mesh upper with skeletal frame of support. Dual-fit system of webbing straps and synthetic overlays creates unsurpassed fit. Exterior heel counter overlay adds support of the foot on uneven terrain. Visible maximum Air-Sole® unit provides great cushioning. Full-length Phylon™ midsole offers lightweight flexibility. BRS 1000™ heel crash zone. Waffle® outsole blade traction technology allows for great traction on a variety of surfaces. Wt. 11.4 oz.