FuelCell foam delivers a propulsive feel to help drive you forward; Geometric midsole extends wider and stacks higher than predecessor; Redesigned outsole with more rubber at the forefoot; Redesigned heel and tongue bring added comfort for fast miles; Reflective detailing; PEBA/EVA foam blend provides durable, lightweight cushioning and fast underfoot feel; Engineered mesh upper provides lightweight support and breathability; FantomFit upper offers ultra-light bonded support; Heel to Toe Drop: 6mm