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The FuelCell Sigma MD-X by New Balance are comfortable spikes for both women and men. This spike has been developed on the basis of new insights of New Balance athletes.
The mesh upper is breathable, but sturdy enough to keep your feet firmly in place while running. The FuelCell Sigma MD-X are designed for running faster pace during short and medium distances on the track (400h - 3k). The heel cap is soft and surrounds your heels comfortably. The FuelCell Sigma MD-X has fixed spikes and is therefore not removable.
The FuelCell foam provides a propulsive feeling that helps you move forward. In addition, the spike features a full-length external carbon plate with integrated pins for grip and propulsion.