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Swiss Performance Running Shoes & Clothing

Product gallery item 1 out of 5 On Ultra Vest 5L Black Unisex Vests

Ultra Vest 5L Black

1.200,00 kr. VAT included

A lightweight, customizable, 5-liter trail running vest for short to medium distances. Includes two 500 ml Hydrapak® flasks.


Also available as Ultra Vest 10L

  • Nanne is 180cm / 5'11" and is wearing a size S

  • Pierre-Antoine is 184cm / 6’04” and is wearing a size M

Key features

  • Weight: 200g

  • Lightweight mesh for optimal airflow and comfort

  • Additional daisy chain loops so you can attach what you need

  • Strategic non-stretch zones minimize bounce and movement

  • Pockets for valuables, gels and even a light jacket

  • Chest closure for a customizable fit

  • Tailored pockets for two 500 ml Hydrapak® flasks

  • Purpose-built trash pocket with easy-to-clean lining

  • Reflective detailing for visibility in low light

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Tested by the best

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.

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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 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.

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Easy access to essentials

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.

Go behind the seams

Explore the Ultra Vest 5L's trail-taming features.

Viewed together

Our mission at On is to ignite the human spirit through movement. Inspired by athletes. Powered by Swiss engineering. Move with us, and Dream On.

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