The long-anticipated On Running running vest is finally here! This lightweight 5-litre vest is purpose-built for short-medium distances and comes complete with a built-in hydration system and customizable fit.

Tested by the On elite team of trail athletes, this high-performance vest with its thoughtful and minimalist design guarantees a seamless experience, whether you're racing, training, or simply chasing that natural high on the trail.

Ultra-light yet incredibly tough. Crafted from breathable mesh material, it provides a snug and secure fit that won't budge. Thanks to the patent-pending closure system and adjustable hem, you can customize the vest's placement to perfectly suit your body. No more annoying bottle bounces; just a smooth and comfortable ride.

Equipped with two 500ml BPA-free Hydrapak® flasks, plenty of pockets and a simple fastening system that tightens, the Ultra Vest 5L is packed with all the essentials. 

Front Features

• 2 Integrated 500mL Hydrapak flasks secured by bungee loops. With internal foam padding behind each flask for comfort. 
• 2 elastic front pockets for easy access to essentials 
• One zippered pocket to store a key
• Leave no trace using the garbage stash pocket with easy-clean lining
• A customisable closure system for personalising your fit 
• Removable bungee chords and daisy chain loops
• Integrated emergency whistle and ID label 
• High-visibility reflective elements

Back Features 

• Light, airy, and stretchable fabric that forms to your body for unlimited range of motion
• A quick-stash back pocket to pack away a light jacket 
• Side pockets at the wait hold your energy gels and snacks
• Daisy chain loops at the shoulders and waist allow you to attach your poles or quiver bag

Product Code:  2UD30030864, 2UD30030553

Weight: 127g