S/Lab Ultra 10L Hydration Vest
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Lightweight and ultra-specific, the S/LAB Ultra 10 is designed for seamless hydration and essentials storage.
What Our Gearhead® Experts Are Saying:
“This vest is so lightweight, it feels like it’s not even there. With quick-access front and rear zippered pockets and optimized storage for long ultra runs, this vest has everything I need for smooth races and adventures."
Born from the vision of François d’Haene, the Salomon S/LAB Ultra 10 is a high-performance hydration vest built for ultra-endurance athletes. Its featherlight construction, combined with intuitive storage and hydration solutions, ensures you stay prepared for long distances without added bulk.
Designed with symmetrical zippered rear pockets and strategically placed front pockets, the S/LAB Ultra 10 makes hydration and gear access effortless—even at full speed. Engineered for precision and comfort, this vest is a game-changer for anyone tackling the demands of ultra distances or technical trails.
Details
- Lightweight hydration vest tailored for ultra running
- Easy-access front pockets for hydration and nutrition
- Symmetrical rear zippered pockets for balanced storage
- Two zippered flask pockets for secure hydration on the go
- Optimized for rapid gear and flask access during races
- Stretchable, breathable materials for long-distance comfort
- Item #SALZAO3
- Volume
- 10L (610 cu in)
- Waist Belt
- integrated
- Pockets
- 1 front hydration, 1zippered rear, 2 zippered flask
- Gear Loops
- yes
- Trekking Pole Carry
- yes
- Claimed Weight
- 4.58oz (130g)
- Activity
- trail running
- Manufacturer Warranty
- limited 2 years
Reviews
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Overall Rating
3.5 based on 28 ratings
Review Summary
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Selecting an option will reload the available reviews on the pageJune 27, 2025
Amazing - exactly what you want for going fast
I don’t understand the criticism of the vest, it’s made to be minimalist, this is not a “bring anything and everything vest”. The vest is amazingly comfortable, you just forget you’re wearing it. Capacity is good with a ton of pockets, you can access 4 zipper pockets without taking it off (2 shoulder, 2 ribcage). I did have to tie a know in the water bottle holder bungees, but now they are completely locked in. Sometimes gels get loose if you’re bombing down trail from The front pockets, but that’s any vest. My only complaint is I wish the back horizontal pocket had a Velcro or something. Have only had my phone pop out one time, but it would provide my peace of mind. Fabric is much better, softer than the standard salmon vests, no chafing ever. This is the exact vest you want if you’re trying to go fast
Originally reviewed on salomon.com
June 25, 2025
Not as reviewed by others
It’s an amazing piece. Super light and stable. The flasks stayed in place and the vest never budged. It’s intended for people who are looking for something light weight that can hold their stuff without budging and it did that. If you are an influencer wanting to fetch your phone every mile for a video then this is not for you because if you put your phone away, then you keep it there. I have taken it on many LONG runs since getting it a month ago and it’s been great.
Originally reviewed on salomon.com
June 24, 2025
Not fit for use
Bought this as wanted it for slightly longer runs that required more kit. The back pocket is fine and fits lots. The front pockets however are awful, really loose and baggy so my phone and nutrition bounce out when I’m running. The zip pockets are small and on the side, making them hard to access and also not big enough for a phone. So really can only be used to carry water and a coat, which is useless. Material on the inside is lovely and nice on the skin, the outer material though is thin and snags easily. Looks nice though.
Originally reviewed on salomon.com
May 18, 2025
Dont let the Amazing reviews fool you.
The vest is overall fine. I had to double knot the bottle straps just to keep the bottles from flopping around. The pockets are pretty bad, and there’s no room for a phone. I hope that those of us who purchased this supposedly “ultra” vest, including myself, can send it back and receive a product that’s actually worth the money and reliable for trail running. Because you can’t go ultra in this vest.
Originally reviewed on salomon.com
February 9, 2025
Pockets don’t hold anything
The best fits great but the two big pockets in the front are not tight so my phone and gels fall out disappointed.
Originally reviewed on salomon.com
February 2, 2025
Enjoying it so far
Best meets my expectations. I wanted something light weight and unnoticeable to carry more than my pockets and belt bag allow - mission accomplished. Really provides peace of mind on my weekend long runs, and worked as desired at my mountain marathon this weekend.
Originally reviewed on salomon.com
February 1, 2025
S Lab Ultra vest — woah! fit
Yeah this is crazy comfortable. —compared to: I’ve run 1000s of miles in my oldest (old blue) adv skin 12. The material on inside of this vest makes the (older) adv skin’s feel like sandpaper in comparison. Fit is a snug grip in all the right places. (Slim but not wirey runner in the case). I measured chest at 39.5 or 40” = medium? Nope, the medium was definitely too small. Large was my fit, just as with adv skin12. You can’t carry a bladder with this (not supposed to anyway) but can tuck another 500ml flask in the back Minimilist, great if you don’t need to haul too much water. 1 great new development: it seems the new adv skin 12s use more of the same materials as this s lab ultra, so that may be something to check out. I only got this because of sale. Otherwise—the new adv skin is comfortable, and can carry more when needed. I’m gonna run this thing top speed in a couple sub-ultra fun races and speedy trail days. Should be a blast.
Originally reviewed on salomon.com
January 15, 2025
Storage options are a deal breaker
This is a very comfortable, lightweight and breathable vest. However, Salomon totally missed the point on the storage options. I cannot see how you can fit 10L of "stuff" in it, except if you only pack clothes in it. As many people mentioned, this vest is missing a pocket for a phone. For many trail runners, having a phone easily accessible in case of emergency and secured into a pocket with a zip is absolutely critical. Even in race condition, many people want they phone accessible to capture a photo, check if they didn't go off route or provide an update to their crew. In that vest, your phone has be in the front pocket, without a zip, and may fly off your pocket quite easily. There are 4 small zipped pocket, 2 on the shoulders and 2 on the side. These are barely large enough to store a set of keys and a gel or 2. You cannot keep these in the main front pockets because they will fly off as soon as you go on a bumpy trail. You will regret buying that vest as soon as you try to fit items that you actually need on a trail run in it.
Originally reviewed on salomon.com
January 14, 2025
Wanted to love it…
I got this vest to replace my Adv.Skin 12, which was ruining some of my running shirts. The mesh fabric, on the inside of the Adv.Skin 12, doesn’t play well with Merino Wool and a few of my LuluLemon shirts. All the shirts look like sand paper was dragged across them. The Ultra 10 solved that issue…but came with a few problems of its own. Basically…the only functional pockets, are the ones that hold the water flask. The others are hard to reach or loose fitting…allowing things to fall out. The two zippered side pockets are very hard to reach and almost impossible to close one handed. The pockets, directly above the zipped side pockets, are almost impossible to reach, as they basically sit right below your armpits. Takes some contorting to accomplish. This vest seems like it was designed for someone with a crew. A crew who will do all the packing and unpacking for you…because the only reachable pockets are the ones in front. The front pockets are nice, but sort of loose. I had a couple of gel packs fall out when I jumped a curb. And that was on flat ground. Not sure how well the pockets would hold onto gear and snacks when running on slopped trails. Also…there is no water bladder pocket, like on the Adv. Skin models. But that is a minor complaint, as I prefer carrying soft flasks on runs anyway. In my opinion, this vest is good, but overpriced. If they had used the same fabrics and went with the exact design as the Adv. Skin models, when it comes to pocket number and placement…that would’ve justified the price and then some. The Ultra is light, it’s comfortable, the included soft flasks are great…but with the lack of functionality…it’s not great. But a big step, fabric wise, in the right direction. I will continue to use the Ultra as my primary hydration vest, but when carrying gear is needed, I will switch back to my Adv. Skin 12. I just wear one of my already ruined shirts when I do that.
Originally reviewed on salomon.com
January 11, 2025
Love at first use
Received my vest yesterday, loaded it up and ran 22 miles with it today - it was awesome, did everything I wanted. So light weight I barely noticed it, truly like a second skin. I’ll be practicing with it every weekend as I begin my ultra journey. Also, I feel much more confident in my next rim to rim excursion at the Grand Canyon with this vest in tow - I think I can actually call my friends challenge on rim to rim to rim. Great product design guys, much appreciated!
Originally reviewed on salomon.com
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