This bottle fits perfectly in the Ultra Vest. And it works just as well on its own. 500 ml capacity.
Reusable bottles are better for the environment. That’s why On doesn’t use any chemicals that could harm you—no matter how often you refill the Soft Flask. You’ll never have to worry about negative side effects. Leak-proof, so you can enjoy every drop. Don’t let thirst get the best of you. With the 500 ml Soft Flask, you can stay hydrated anywhere. On the go, you can easily stow it in your Ultra Vest and get back on the move right away. Filling or cleaning the Soft Flask is just as easy as opening the bottle’s cap.
| Product Name: | On Soft Flask 500ml - Translucent | Black |
| Manufacturer: | On Running |
| Item Code: | ONR702351 |
| activity: | Run |
| material: | Composite |
| Hydration, bottle & cage : | Folding Bottle |
| Volume: | 0.5l |
| Model year: | 2026 |
| Collection: | Autumn/Winter |
| Color: | Transparent |
| GTINs: | 7615537125305 |