For the trail runner who wants the perfect blend of lightweight cushioning of the Nike Flex 2012 Run with the durability and traction of a trail shoe. UPPER: Trail-ready upper with gusseted tongue and gilly lacing system for a customizable fit. Reinforced toe and heel for durability. MIDSOLE: Dual-density Phylon midsole features a firmer foam carrier and a softer foam core that delivers premium cushioning closer to your foot. OUTSOLE: Flexible outsole design with angled edges and spaces between each lug to allow for quick and easy mud shedding and optimal grip in all conditions