"New Balance® FuelCell Flite D: The FuelCell Flite D is a unisex track spike built for athletes who compete between 400m and 5K and want a fast, responsive shoe that stays light when the race is on the line.At 4.9 ounces, the FuelCell Flite D keeps weight out of the equation so you can focus on the effort. The breathable mesh upper lets air move through while holding your foot securely in place as the pace climbs. A high-rebound FuelCell midsole gives you that propulsive pop through each stride, and the Pebax spike plate with removable 6-pin spikes lets you dial in your traction based on the surface and distance. Whether you're running a single lap or pushing through a 5K, the setup is responsive and snappy from start to finish.Why Our Fit Experts Love This Shoe""This spike is impressively light without feeling flimsy. The FuelCell midsole actually gives you some pop off the ground, which you don't always get in a track shoe at this weight. The 6-pin plate setup is easy to work with, and the mesh upper keeps things comfortable even when you're moving fast."" - Sullivan, Road Runner Sports Fit Expert, Naperville ILWho It's Best ForIf you're a track athlete competing anywhere from the 400m to the 5K and want a spike that's light, breathable, and built around a responsive ride, the FuelCell Flite D is worth a close look. It works well for both sprinters and middle-distance runners who want customizable traction and a midsole that gives back energy rather than just absorbing it. The unisex fit makes it a practical option for any athlete on the track. VIP Family members can take the FuelCell Flite D for a 90-Day test drive with our Perfect Fit Guarantee."