Why We Love the On Ultra Vest 10L:

The On Ultra Vest 10L is a game-changer for long-distance trail runners. It is designed to keep you hydrated with its built-in hydration system, while also providing maximum comfort with its breathable mesh construction. The adjustable hem and innovative closure system ensure a secure fit that won't budge. You can trust this vest to keep your essentials safe, whether you choose to store them in the detachable 5L dry pack, clip them to the daisy chain loops, or secure them with the bungee tie-offs.

Key Features:

• 10-liter capacity, perfect for long trail runs
• Made with a unique blend of recycled materials for sustainability
• Breathable mesh construction for all-day comfort
• Innovative closure system for a secure and adjustable fit
• Built-in hydration system with two BPA-free Hydrapak soft flasks
• Includes a detachable 5-liter dry pack for additional storage
• Minimal bottle bounce thanks to non-stretch materials
• Daisy chain loops and modular attachment for carrying poles and other gear

Responsible Collection Recycled/Repurposed Material:

Face fabric: 85% recycled nylon, 15% elastane

Pockets: 41% nylon, 41% recycled nylon, 18% elastane

Removable pouch: 56% nylon, 44% recycled nylon

Volume: 10L (610cu in)

Support/Suspension: mesh

Shoulder Straps: mesh, dual adjustable bungee sternum straps

Waist Belt: none

Hydration Compatible: yes

Reservoir Included: 2 Hydrapak soft flasks

Access: back, front

Pockets: 2 front soft flask, 1 removable dry bag, 1 rear reservoir sleeve

Gear Loops: daisy chain

Trekking Pole Carry: yes

Claimed Weight: 7.1oz

Activity: running

Manufacturer Warranty: limited