adidas Sprintstar 4 Running Spikes - AW15 Weight: 155 Grams SPRINTWEB - Forefoot construction which incorporates a super lightweight bonded upper for an optimal feel and offers improved performance. Pebax Nylon Plate - Lightweight outsole which offers superb energy return and durability. Synthetic Overlays - Reduce the overall weight of the shoe, whilst holding the foot securely. Lightweight Internal Support - The midsole is engineered to enhance structural strength.