Wise Sherpa Max: the full RunMorph review

For years, trail vests ran on two speeds: storage on the back, out of reach while running, and two front pockets for flasks, often too short or too wide. Wise, a brand based in Annecy, decided to flip that logic in 2023 with the Sherpa, then pushed it further with the Sherpa Max: almost everything goes in and comes out at the front, without taking the vest off, thanks to a patented flask system that loads from the side. The bet pays off, right up to one specific spot on the pack that RunMorph breaks down below, and a price that remains the number one sticking point.

Wise, the Annecy brand redesigning the trail vest

Wise Trail Running was founded in 2019 in Annecy by a couple of trail runners, Axelle and Guillaume. The brand built its range around one simple principle: a trail vest is judged first on what you can reach without taking it off mid-race. The Sherpa, launched in 2023, introduced a patented side-loading flask system that breaks with almost the entire market, where the flask slides in from the top of a narrow pocket. The Sherpa Max keeps that base and extends it: a third flask pocket was added inside the rear tunnel pocket, bringing the gear you can reach on the move to almost 10 litres out of the pack's 12. This is the first Wise product RunMorph has tested, a brand completely missing from our catalogue until now despite a very visible presence on the start lines of Alpine races.

RunMorph's advice: if you are torn between the Sherpa Max and a more classic vest like the Salomon S/Lab Ultra 12, ask yourself about budget before comfort. Both hold up on stability, but 80 euros separate the two vests at full retail price.

Wise Sherpa Max specs

Sherpa Max: what the brand claims vs what was measured

Wise claims 139 g for size 4 of the Sherpa Max. Independent measurements on the previous generation, the Sherpa, which shares the same architecture and materials, range from 121 g in size 3 to 140 g in size S depending on the tester and the scale used, which points to size differences rather than misleading marketing. One point deserves bold type: the rear mesh pocket sold as bladder compatible has, on the generation checked by independent sources, neither a dedicated hook nor a tube routing loop, so you have to improvise the setup. Wise has not announced a specific fix for the Sherpa Max, so RunMorph flags it as a grey area to check before buying with a bladder in mind.

Fast Flask Access: the tech that changes refuelling

© Wise, official photo used for editorial purposes

Three independent testers documented the same move: the flask goes in cap first through a high strap, then locks in from the side or from below, in a few seconds, whether the pack is loaded or not. A detailed test published by Le Comparatif du Trail describes a patented side-loading system that it rates as clearly better than the classic top entry into a narrow pocket. An experienced 47-year-old user, testing for Outzer, confirms it under a heavy community test load (rain jacket, trousers, fleece on top of the flasks): the pack does not move, empty or full, and the stretch fabric lets you pull the flasks up slightly to drink on the run. A second Outzer tester, 32, reports the same stability over several runs in intense heat and in the rain, with one caveat shared by both: once empty, the flasks tend to slide to the bottom of the large front pockets, so you have to reseat them or stash them in another pocket.

The three sources also agree on a second strength: the two XXL front pockets, up to 1.5 litres each not counting the flasks, leave almost 10 litres of gear within reach without taking the pack off. At RunMorph, what stands out most is how this access changes the way you prep for a race: the reflex becomes moving as much as possible to the front rather than the back, gloves, headlamp, nutrition, so you never have to stop and take the pack off mid-effort.

Field test: stability and organisation

© Wise, official photo used for editorial purposes

In a community test over several kilometres in full ultra setup, with UTMB-style mandatory kit, the 47-year-old Outzer tester reports a pack that does not bounce, does not chafe and simply disappears, even fully loaded. The second Outzer review, tested in intense heat and in the rain over several runs, confirms good breathability despite a front panel that covers more than a classic vest, with fast drying claimed for the Everdry fabric. The self-locking front zip lets you adjust the opening on climbs without any risk of it opening by itself on descents, a detail noted independently by both Outzer testers.

On sizing, all three sources fully agree: the Sherpa must sit close to the body, which means going one size down from your usual technical apparel size. One tester who normally wears an M switched to an S after trying it on, a choice he recommends confirming in store or with the size guide rather than guessing.

Wise Sherpa Max vs Salomon S/Lab Ultra 12 and Oxsitis Gravity 10L: the comparison

Bottom line: the Sherpa Max is the lightest of the three for a similar volume, but also the most expensive by 80 to 140 euros depending on the rival. The Salomon S/Lab Ultra 12 keeps the edge on price and a wider after-sales network in France, while the Oxsitis Gravity 10L remains the most affordable option for a runner new to ultras who does not want to spend 280 euros on a first vest.

Our field verdict: who is it for?

© Wise, official photo used for editorial purposes

The Sherpa Max targets a precise profile: the runner preparing an ultra with a hefty mandatory kit (waterproof jacket, survival blanket, water reserve, refills) who wants to keep the essentials within reach without ever stopping. In a build-up based on a RunMorph training plan towards a 100 km or a stage race, the time saved at every refuel adds up over a race lasting more than 10 hours. For a road half marathon or marathon build-up, the investment makes no sense: go for a belt or a lighter, cheaper vest instead.

The RunMorph Coach verdict

The Wise Sherpa Max delivers where it matters most: stability and flask access, two criteria on which 3 independent sources agree without reservation. The 280 euro price and the unzipped rear pocket are the two things holding the score back, especially since a built-in pole holder is still missing. 8.4/10: an exceptional vest for ultra distance and multi-day trips with a full mandatory kit, for runners whose budget and use justify this level of specialisation.

Key takeaways for your training

• 139 g claimed: one of the lowest weights in the 12 litre segment, compared with 205 g for the Salomon S/Lab Ultra 12.
• 3 x 500 mL flasks included: enough to cover a full refuel without any extra accessory.
• Just 1 real documented flaw: the unzipped upper rear pocket, to avoid for bulky loads.
• 50 euros extra for the Open Quiver if you want to carry poles.
• 280 euros at retail price: plan for that budget before comparing with vests at 140 or 200 euros.

FAQ

Is the Wise Sherpa Max suitable for a first 50 km ultra?

Yes, its claimed range of use goes from 20 to 180 km, and 12 litres easily cover the mandatory kit for a 50 km. For a first ultra, though, the 280 euro budget remains the main hurdle compared with 10 to 12 litre vests at 140 to 200 euros.

Do you need to buy the quiver as well?

If you plan to run with poles, yes: the Sherpa Max has no built-in pole holder and requires the Wise Open Quiver, or a compatible Salomon Custom Quiver, from 50 euros.

Is the pack compatible with a hydration bladder?

The rear mesh pocket announced by Wise can in theory hold a bladder, but independent tests on the previous generation found neither a hook nor a tube loop. Check this before buying if you plan to rely on a bladder rather than flasks.

What size should you choose for the Wise Sherpa Max?

All 3 testers consulted unanimously recommend going one size down from your usual technical apparel size, since the pack is designed to sit very close to the body across the 6 available sizes.