What Our Gearhead(R) Experts Are Saying: "I've logged long hours on alpine loops in the Cloudultra 3 and the energy return is next level. That Helion HF midsole really does hold strong, even deep into the run. It's breathable, snug, and grips techy terrain better than most trail shoes I've worn."We reach for the On Cloudultra 3 Trail Running Shoe when the trail is long and the terrain is demanding. Designed to thrive on long mountain efforts, this ultra-distance runner is built with features that keep fatigue at bay and performance at a premium. Whether we're grinding up gravel grades or bombing down rocky descents, the Cloudultra 3 keeps us steady and stoked. Its updated Missiongrip(TM) outsole-designed through Finite Element Analysis-offers surgical traction over varied terrain, while the Helion(TM) HF midsole delivers powerful rebound with every step. Lightweight yet supportive, the engineered woven upper dries fast, breathes easily, and molds to our foot shape for an adaptable fit. With a forefoot rocker and low drop, the Cloudultra 3 brings effortless speed to every trail mile.