"Men's On® Cloudultra Pro: When the trail gets long and the terrain gets technical, the On Cloudultra Pro is built to keep you moving. This neutral men's ultra-trail running shoe is designed for runners who push deep into long distances on rugged ground - where consistent pace and reliable footing matter as much as comfort. The Leno weave upper is quick-drying and abrasion-resistant, with engineered zoning that balances breathability and support across the foot. If you spend hours on the trail, that combination keeps things comfortable without adding unnecessary bulk.Underfoot, the Helion™ HF hyperfoam midsole provides rebound and stability through the miles, while the Speedboard® rebound system and a strong rocker geometry work together to help you maintain a consistent stride when fatigue starts to set in. The outsole is On's most advanced Missiongrip™ compound, redesigned using Finite Element Analysis (FEA) to optimize grip and durability across varied trail surfaces. Every piece of the shoe is oriented toward one goal: keeping you running efficiently when the distance gets serious. Sizing runs up half a size, so keep that in mind when ordering.Why Our Fit Experts Love This Shoe""I put these on for a long trail run and noticed right away how the rocker keeps your stride rolling forward even when your legs are tired. The upper held up well over rocky sections and didn't feel hot. For guys going long on the trails, this one is hard to argue with."" - Michael, Road Runner Sports Fit Expert, Seattle WAWho It's Best ForIf you run ultras or just like to go long on technical trails, the On Cloudultra Pro is worth a serious look. It's a neutral trail running shoe that suits runners who want reliable traction, a supportive upper that handles rough terrain, and a midsole setup that helps maintain pace over extended distances. It fits best for those who prioritize performance and durability on the trail rather than casual hiking or road use. Note that this shoe fits large - ordering a half size down is recommended. VIP Family members can take the Cloudultra Pro for a 90-Day test drive with our Perfect Fit Guarantee."