Women's FuelCell SuperComp Trainer v3Built for half and full marathon training, these shoes deliver comfort every step of the way. FuelCell midsole foam with approximately 3% bio based content delivers a propulsive feel to help drive you forward. Bio based content is made from renewable resources to help reduce our carbon footprint. Energy Arc pairs sport specific carbon fiber plate geometry with strategic midsole voids, designed to increase stored energy to deliver a higher amount of