"Nike® ACG Ultrafly Trail: The Nike ACG Ultrafly Trail is built for runners who want to move fast and stay efficient on the trail. This lightweight trail racing shoe pairs Nike's responsive ZoomX foam with a full-length carbon fiber plate, giving you a propulsive ride that helps maintain speed over long distances and technical terrain.The midsole features an ""unwrapped"" heel design, which helps reduce weight while maintaining cushioning where you need it most. Up top, the breathable upper keeps things light and secure without adding bulk. Underfoot, the Vibram® Megagrip outsole provides reliable traction, so you can stay confident whether you're climbing, descending, or pushing the pace.If you're chasing performance on race day or want a faster, more responsive trail shoe for tempo efforts, the Ultrafly Trail delivers that efficient, forward-driving feel."