Name: On Ultra Vest 10L (Unisex)
SKU: 10475

A lightweight, 10-litre trail running vest for long distances with a built-in hydration system and removable dry pack.

Tested by the best
With a 10-liter capacity, this high-performance vest was built for distances at the longer end of the ultra spectrum. Tested and trialed by our elite team of trail athletes, its functional, modular design ensures a seamless experience on any trail, whether racing, training or chasing the high.

Optimized for stability
Ultralight yet tough, the breathable mesh material is tailored to provide a precise fit that stays put, while the patented-pending closure system and adjustable hem allow you to adapt the vest's placement to best suit your body. Non-stretch materials minimize bottle bounce for a smooth and comfortable ride.

Easy access to essentials
With two BPA-free Hydrapak® flasks, a detachable 5L dry pack and space for a hydration bladder on the back, the Ultra Vest 10L is packed with all the essentials – and then some. Think additional daisy chain loops and modular attachment for your poles or quiver bag, plus a zippered card pocket on the back.

Materials
Main Fabric – 85% recycled polyamide, 15% elastane Pockets – 41% polyamide, 41% recycled polyamide, 18% elastane Removable Pouch – 56% polyamide, 44% recycled polyamide Other features – Undyed materials

Small zippered pocket on the back holds a few credit cards or calories.

ENERGIZE ON THE FLY
Bungee loops keep the integrated Hydrapak® flasks firmly in place, so you can hydrate and refuel hassle-free. Internal foam padding behind each flask provides extra comfort.

SAFETY FIRST
Stay safe and seen in low light with high-visibility reflective elements.
Prepare for the unexpected with an integrated emergency whistle and ID label.

FIND YOUR FIT
Thanks to a combination of removable bungee chords and daisy chain loops, weight is evenly distributed for optimal stability.
The customizable closure system makes it easy to personalize your fit – for maximum comfort and security.
Side adjustments on waist for added support

SUPREME STORAGE
Leave no trace thanks to the garbage stash pocket with easy-clean lining.
Pack your essentials into the two elastic front pockets for easy access.
One zippered pocket to store a key.
A quick-stash back pocket for a light jacket.
Small zippered pocket on the back holds a few credit cards or calories.

FUNCTIONAL FABRICS
Breathable, ultralight mesh hugs your body, allowing you to move freely, while strategic non-stretch zones around the chest and shoulders help to maintain stability and minimize bounce.

READY FOR ANYTHING
The integrated reservoir pocket on the back of the vest is compatible with a hydration bladder, ensuring you've got ample H2O on hand during demanding endurance events.

MODULAR DESIGN
Made with 100% recycled ripstop nylon, a 1500 mm PU coating and a silicone outer finish, the removable 5L pack is highly water-resistant. To seal the deal, it's also seam-sealed.