Nike Air Alvord 8The Nike Air Alvord 8 is a sneaker especially designed for trail running. They feature a durable mesh upper with supportive overlays, forefoot protection stone shield, Phylon midsole with Air-Sole unit, and a BRS 1000 composition rubber outsole. Get the comfort and the protection you need when you're enjoying the days of summer with a nature hike, jog, or run.