Built for speed, the New Balance FuelCell Propel women's neutral cushioned road running shoes in Summer Fog Grey have an incredibly lightweight solid rubber and N-Durance® outsole. The NB's road runner has a trace fiber upper offers zonal function support without excess seams or layers and comes in vibrant colors that brighten up any run. Fuel your run with fun. The NB's ultra-responsive FuelCell Propel is engineered to provide the most pinnacle propulsion and snappy energy return. The NB's high rebound FuelCell formulation is new and improved, delivering a unique underfoot liveliness that’s designed for the road or the gym.