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On Running
Ultra Vest 10L

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Why We Like The On Ultra Vest 10L

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
Responsible Collection
[face fabric] 85% recycled nylon, 15% elastane, [pockets] 41% nylon, 41% recycled nylon, 18% elastane, [removable pouch] 56% nylon, 44% recycled nylon
10L (610cu in)
Shoulder Straps
mesh, dual adjustable bungee sternum straps
Waist Belt
Hydration Compatible
Reservoir Included
2 Hydrapak soft flasks
back, front
2 front soft flask, 1 removable dry bag, 1 rear reservoir sleeve
Gear Loops
daisy chain
Trekking Pole Carry
Claimed Weight
Manufacturer Warranty

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