UPPER: Lightweight engineered mesh for breathability and zonal support. Perforated neoprene-inspired inner sleeve for added comfort and support. MIDSOLE: A lightweight, durable, and cushion foam with Nike Free 5.0 training specific flexibility. OUTSOLE: Strategically placed rubber pods in heel and forefoot to give training specific indoor and outdoor traction. Designed for: Nike Training Club, cardio, strength and core.