The On Ultra Vest 10L is optimized for long-distance trail running, keeping us going with a built-in hydration system, a breathable mesh construction, and a secure fit thanks to the adjustable hem and patent-pending closure system. This vest keeps us hydrated and stores our other essentials securely whether stuffed in the detachable 5L dry pack, clipped to the daisy chain loops, or lashed with the bungee tie-offs.
- 10-liter trail running vest built to go the distance
- Built with a mixture of recycled materials
- Breathable mesh construction enhances all-day comfort
- Patent-pending closure system offers a secure fit
- Built-in hydration system with two BPA-free Hydrapak soft flasks
- Complete with a detachable 5-liter dry pack for added storage
- Non-stretch materials keep bottle bounce to a minimum
- Daisy chain loops and modular attachment carry poles and other gear
- Item #ONFB09N























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