LIGHTWEIGHT Performance TRAINER; The Speed 500 IGNITE is built for the runner who's looking for that extra edge of speed for fast, everyday training.; Energy Return: Full length Ignite foam with increased energy return properties reduces ground contact time and increases cadence; Propulsion: Rubber outsole band stretched over flex grooves provides a powerful, snappy toe-off which increases stride length. Lightweight: 260 grams of light performance racer to give you that speedy edge.
