The ON Cloudultra is Swiss-engineered and ready to take runners further. A Hard-hitting trail running shoe delivers high energy return and impressive cushioning – even hours into your mission. Smart tech to power your longest trail runs. Engineered to keep you feeling fresh even after several hours on the trail, the Cloudultra 3 delivers maximized energy return with ample cushioning thanks to a Helion HF hyperfoam midsole. So you can go, go, go It's as tough as it looks. The shoe features an engineered Leno weave upper which is highly durable and abrasion-resistant in zoned sections, as well as being breathable and quick drying. Giving your feet everything they need to complete the mission. Meet our most advanced grip – ever. Featuring an updated Missiongrip outsole with a new lug profile developed with FEA (Finite Element Analysis). For unparalled grip and traction.