What Our Gearhead(R) Experts Are Saying:"I've never felt anything quite like this on the trail-lightweight, crazy responsive, and surprisingly stable. The ZoomX foam is the standout here, giving it a road-race feel underfoot, but the Vibram outsole keeps it locked in even on loose terrain. It's made for race day, but honestly, I'll wear it anytime I want to move fast and feel dialed in."The ACG Ultrafly Trail Running Shoe brings road-race speed to the wildest terrain. Designed for trail runners chasing PRs, FKT attempts, or serious vertical gain, this ultra-light, high-performance shoe combines ZoomX cushioning, a responsive plate, and trail-focused grip in a sleek and race-ready package. Its full-length ZoomX midsole delivers supercritical foam cushioning for soft landings and energetic toe-offs, while a redesigned plate adds torsional control with 30% less rigidity than the previous Ultrafly, allowing smoother transitions on uneven ground. A Vibram Lightbase outsole with 3mm lugs offers lightweight traction you can trust across technical and high-speed descents. The Vapor Dry upper keeps things breathable and quick-drying without sacrificing durability, and the internal midfoot band adds lockdown where it matters most.