ON Ultra Vest 5L - Undyed White
ON Ultra Vest 5L - Undyed White
ON Ultra Vest 5L - Undyed White
ON Ultra Vest 5L - Undyed White
ON Ultra Vest 5L - Undyed White
ON Ultra Vest 5L - Undyed White
ON Ultra Vest 5L - Undyed White

ON Ultra Vest 5L - Undyed White

Regular price$167.00

Make 3 payments of $55.66
no fees when you pay on time

ON Ultra Vest 5L - Undyed White

A lightweight, 5-liter trail running vest for short-medium distances with a built-in hydration system and removable dry pack.

With a 5-liter capacity, this high-performance vest was built for shorter distances. Tested and trialed by our elite team of trail athletes, its thoughtful, minimalist design ensures a seamless experience on any trail, whether racing, training or chasing the high.

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

With two 500 ml Hydrapak® flasks for water, plenty of pockets and a simple fastening system that tightens, the Ultra Vest is packed with all the essentials – and then some. Think additional daisy chain loops that are strategically placed to allow you to attach your poles or quiver bag.


  • XXS: Fit chest size 80-84cm / 31.5-33"
  • XS: Fit chest size 85-89cm / 33.5-35"
  • S: Fit chest size 90-95cm / 35.5-37.5"
  • M: Fit chest size 96-101cm / 38-40"
  • L: Fit chest size 102-108cm / 40-42.5"
  • XL: Fit chest size 109-115cm / 43-45.5"

Weight: 127g


Main Fabric – 85% recycled polyamide, 15% elastane Pockets – 41% polyamide, 41% recycled polyamide, 18% elastane

Tech & Features:

  • Energise 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 - prepare for the most unpredictable of trails with high-visibility reflective elements
  • Safety first - prepare for the unexpected with an integrated emergency whistle and ID label
  • Find your fit - the customisable closure system keeps weight evenly distributed for optimal stability
  • Supreme storage - leave no trace with a stash pocket with easy-clean lining
  • Supreme storage - take what you need with you with two elastic front pockets
  • Supreme storage - one zippered pocket to store a key
  • Supreme storage - a quick-stash back pocket for a light jacket
  • Functional fabrics - breathable, ultralight mesh hugs your body, allowing you to move freely, while strategic non-stretch zones around the chest and shoulders to help to maintain stability and minimise bounce

We offer the following delivery options for all UK orders:

Free Delivery- 1-2 Working Days. Orders over £50
Standard Delivery £2.95 (1-2 working days) - Orders under £50
Next Day Delivery £4.95 (orders placed before 3pm Mon-Fri)

You have 28 calendar days to return the item to us. To be eligible for a return, your item must be in the original packing, unused and in the same condition that you received it. Please see our returns page for further information.

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