How to Choose a Running Hydration Vest
On Ultra Hydration Vest
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Built for longer distances, the On Ultra hydration vest includes 2 flasks and a removable dry pack. Its modular design ensures a seamless trail experience—whether racing, training or chasing the high.
Shop similar products- Includes 2 BPA-free HydraPak flasks and a detachable 5 L dry pack; back has space for a hydration bladder
- Ultralight yet tough, the breathable mesh material is tailored to provide a precise fit that stays put
- Patent-pending closure system and adjustable hem allow you to adapt the vest's placement to best suit your body
- Nonstretch materials minimize bottle bounce for a smooth and comfortable ride
- Features daisy chain loops and modular attachments for your poles or quiver bag (not included), plus a zippered card pocket on the back
- Tested and trialed by the On elite team of trail athletes
- Hand-wash only; do not tumble dry, bleach or iron
Imported.
View all On Running Hydration Vests| Best Use | Trail Running |
|---|---|
| Gear Capacity (L) | 10 liters |
| Gear Capacity (cu. in.) | 610 cubic inches |
| Reservoir Compatible | No |
| Reservoir Included | No |
| Bottle(s) Included | 2 bottles |
| Liquid Capacity (L) | 1 liters |
| Liquid Capacity (fl. oz.) | 34 fluid ounce |
| Number of Exterior Pockets | 7 |
| Weight | 7 ounces |
| Material(s) | Main mesh: 85% recycled stretch nylon/15% elastane; pockets: 82% recycled nylon/18% elastane; removable 5L pack: nylon ripstop with 1,500 mm PU coating and silicone outer finish |
| Gender | Unisex |
Buying Advice
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Andrew
Right there with Salomon as best in the game.
1 year ago
Yes, the size guide seems off, but I'm not going to drop stars on account of that. Just try one on or size up. For reference, I have a 99cm chest which says I could fit a medium; no way. Went large, which is still tight, but I like that sort of fit. Anyway, finally a vest rivalling Salmon! I love the Advanced Skin 12 but wanted something smaller - and not black! - for faster, hot weather efforts. Materials and stitching appear rugged. As is tradition with On goods, not the best shoes, fantastic everything else.
Height:6'2"
Age:35–44
Weight:150–175 lbs.
Yes , I recommend this product
Hhay
Portland, Or
Favorite vest
1 year ago
This vest is my absolutely go to for any distance run. The pocket placement is super convenient and carries everything I need, while still feeling incredibly light. This vest is a game changer.
Height:5'0"
Age:25–34
Weight:100–125 lbs.
Yes , I recommend this product
Blaster
Portland
Maxxx blast on the trails
1 year ago
Sick product… the versatility of the pole attachment allowed me to adapt to elevation training with true confidence. Can wait for more trail products from this brand! Def a recommend.
Height:6'2"
Age:25–34
Weight:175–200 lbs.
Yes , I recommend this product
jlbrew3
Chicago, IL
Runs very small, otherwise great
1 year ago
I returned this vest shortly after receiving it due to the sizing. For context, I'm a size 44 chest and ordered an XL which On says fits 43 - 45.5" so I should be right in the middle. While the vest did fit, it was very tight and by the time you loaded anything into it, it was clear it wouldn't fit well. Aside from the fit, the construction seemed high quality and there was tons of storage. If you're smaller than I am and can fit into their sizing, I'd say definitely give it a try.
Height:6'4"
Age:25–34
Weight:200–225 lbs.
Irunformypizzaaddiction
Portland, OR
Stylish, comfortable and lightweight
1 year ago
This ultra vest from On not only turn heads on the trails because of it's stylish look, it's also very comfortable, lightweight and the pocket placement is perfected. Definitely a go-to in my running quiver now!
Height:5'11"
Age:25–34
Weight:175–200 lbs.
Yes , I recommend this product
Dave
Portland, OR
Truly Ultra
1 year ago
Amazing trail running vest. Super stable and comfortable. Perfect pocket placement. And the dry bag on back keeps any of your gear protected from the elements. Highly recommend!
Height:5'11"
Age:35–44
Weight:150–175 lbs.
Yes , I recommend this product
imomnoming
Oregon
SUPER lightweight and versatile
1 year ago
This running vest is SO lightweight and comfortable when wearing. It is easy to adjust and put on. I really appreciate all the different pockets and they come in so handy. I can carry everything that I need and it all feels secure when I am running. Also a major plus that it looks so stylish.
Age:25–34
Weight:150–175 lbs.
Height:5'4"
Yes , I recommend this product