Pick up the pace with confidence in the supportive fit of the Nike Zoom Span. Engineered mesh upper creates areas of support and breathability where you need them most. Woven midfoot saddle locks the foot in place for a secure fit. Dual-density midsole cushioning helps correct pronation, creating a more natural running stride. Zoom Air unit in the forefoot for fast, responsive cushioning with every step. Dynamic Support wedges foam creates a smooth transition from heelstrike to toe-off. Full-length rubber outsole for durable traction on any surface. Wt. 7.7 oz.