The FuelCell foam in this shoe provides a propulsive sensation to assist in propelling you forward. The NDure upper technology is specifically designed to enhance durability. The Fit Weave Lite material maintains its shape for focused stretch and support, while still maintaining a lightweight feel. The Energy Arc feature combines advanced carbon fiber plate geometry with strategically positioned midsole voids, resulting in increased stored energy and a high level of energy return. Furthermore, the full-length Ndurance outsole offers superior traction and durability, prolonging the lifespan of the shoe.