Meet the FuelCell Rebel v4, the most versatile in the FuelCell platform. Designed for both uptempo runs and daily mileage, this lightweight shoe boasts a new PEBAX blend FuelCell offering a snappy high energy return ride. Speed isn't the only strength of this update! With a widened midsole platform and redesigned outsole, stability and durability are also excellent for the Rebel v4. Its radical new FANTOMFIT upper material ensures a strong lockdown with minimal weight.