On Cloudultra Pro
On's ultra-distance trail racer, with a reinforced fiberglass Speedboard and dual-density Helion HF foam.
Specs
- Weight (g)
- 275
- Stack (mm)
- 39
- Drop (mm)
- 6
- Cushioning
- Max
- Stability
- Neutral
- Plate
- Nylon
- Surface
- Trail
- Price
- Premium
- Lifespan (km)
- 600
- Released
- 2025
Lifespan is our editorial estimate — no manufacturer publishes one — as is any figure the linked source does not state.
Best for
The Cloudultra Pro is On's ultra racer for the trail, and the board is what sets it apart. A reinforced fiberglass Speedboard pushes you along over dual-density Helion HF foam, with a 39 mm stack, a 6 mm drop and a Missiongrip outsole, and the shoe comes in at about 275 g. CloudTec is engineered for stability.
It suits you for long trail races and ultras, marathon-length efforts off road included, where you want a lot of cushion and a board that keeps you moving mile after mile.
It is not a nimble short-course shoe. The tall stack and the board add bulk, and it is more shoe than casual trail miles or easy weekday runs call for.