The Ultrafly Trail takes what you love about the original and refines it, so you can go the distance. The springy ZoomX foam is more responsive and the full-length carbon plate is softer for a smooth ride. The outsole helps reduce weight while maintaining enhanced grip as the miles pile up. Benefits:Our newest iteration of ZoomX foam delivers durability, softness and responsiveness made for trail running. The full-length carbon fiber plate has reduced stiffness compared to the original Ultrafly. VibramA(R) Megagrip outsole offers exceptional traction on the trail with less weight. Strategically-placed lugs add grip for uphill and downhill racing. [] Style: IR7317; Color: Aloe Verde/Vegas Gold/Barely Volt; Size: 11.5; Gender: Male; Age Group: Adult | Nike ACG Ultrafly Trail Trail Racing Shoes in Green, Size: 11.5 | IR7317-300