New Balance FuelCell SuperComp Trainer Women's Running Shoes Vibrant Spring Glo : The New Balance FuelCell SuperComp Trainer brings the energy-return technology from race day to a high mileage training shoe. In the new Energy Arc technology, a high-stack midsole houses an arched carbon fiber plate sandwiched between two layers of FuelCell cushioning, leaving a hollow channel through the middle. With each foot strike, the plate is flattened into the void, returning energy as it reshapes, creating a high rebound sense of propulsion. The New Balance FuelCell SuperComp Trainer looks, feels, and performs differently. Features Energy Arc: Energy Arc pairs sport-specific carbon fiber plate geometry with strategic midsole voids, designed to increase stored energy to deliver higher energy return FuelCell foam delivers a propulsive feel to help drive you forward 47mm midsole height Breathable, flat knit upper with lock-in fit feeling 'N' logo design wraps around to lateral side of shoe