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Mammut Aenergy Air HS Hooded Review

This lightweight hard shell excels for backcountry missions in warmer weather
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Mammut Aenergy Air HS Hooded Review (The Mammut Aenergy Air during some on-slope testing in the early season.)
The Mammut Aenergy Air during some on-slope testing in the early season.
Credit: Sam Willits
Price:  $475 List
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Manufacturer:   Mammut
By Jeff Dobronyi ⋅ Review Editor  ⋅  Dec 2, 2022
  • Warmth - 20% 2.0
  • Weather Resistance - 20% 9.0
  • Comfort and Fit - 20% 9.0
  • Ventilation - 20% 8.0
  • Style - 10% 4.0
  • Features - 10% 5.0

Our Verdict

The Mammut Aenergy Air is a lightweight hard shell jacket featuring Pertex Shield outer material for backcountry ski missions where every ounce counts, earning our favor as the best ski jacket for spring skiing and ski mountaineering. It features a highly protective shell fabric with great design attributes to keep the user dry in bad weather. The fit is tailored with the contours of the body, making this an agile jacket for skinning, bootpacking, or making hop turns down a steep couloir. The shell material is relatively breathable, and huge armpit vents help you dump heat when you need to. As a minimalist hardshell, this jacket is light on warmth and features, and we don't love the style of the big brand on the front. That said, this is the best ski shell for moving fast and light on big ski mountaineering missions.
Great fit
Not warm
Minimally featured
Poor style

Our Analysis and Test Results

This jacket keeps the user dry and comfortable while moving fast through the mountains, but it doesn't do much else. It is a niche piece for ski mountaineering, and it excels in that application.

Performance Comparison

mammut aenergy air hs hooded - the mammut aenergy air hs hooded at work on the slopes during our...
The Mammut Aenergy Air HS Hooded at work on the slopes during our on-piste testing.
Credit: Sam Willits


The Mammut Aenergy Air is a thin hardshell that does not have much insulating power. There are no lofty materials used to keep warm air trapped inside the jacket, and with a shorter hem than many other ski jackets, warm air can escape easily. This is a boon for ventilation, but in terms of warmth, this jacket doesn't supply much.

The cut of the jacket is on the tighter side, meaning there isn't as much room to layer insulating mid-layers, so it's harder to stay warm in this jacket on cold days on the ski hill. The fabric is very breathable, again a benefit to those seeking ventilation, but it also allows cold winds to penetrate the inside. If you are looking for a warm shell, they are out there, but this isn't one of them.

mammut aenergy air hs hooded - the mammut aenergy is a thin hardshell that doesn't provide any...
The Mammut Aenergy is a thin hardshell that doesn't provide any warmth on its own.
Credit: Jackie Kearney

Weather Resistance

This jacket is built to keep the user dry. With a waterproof membrane and taped seams all over the place, this jacket is impervious to water. The hood fits perfectly over a helmet, and the wrist cuffs close tightly with large hook-and-loop straps. Two drawcords in the hem and one in the hood help seal the jacket from above and below. Waterproof zippers round out the completely waterproof design.

If we had to pick one gripe with the Aenergy's weather protection, it would be that the shell material seems to allow cold winds to penetrate relatively easily. The shell material feels thin, so it is possible that heat is convected away from the body as cold winds blow over the shell fabric. Whatever the case may be, if you are sitting on a windy chairlift ride, this jacket isn't as protective as a thick Gore-Tex jacket. But for ski mountaineering, where the user is generally moving constantly and won't hang out on windy summits for too long, this jacket provides plenty of protection.

The Mammut Aenergy Air is a great companion for stormy days on the skin track.
Credit: Jeff Dobronyi

Comfort and Fit

We love the Aenergy Air's fit. It feels perfectly contoured to athletic bodies, allowing freedom of movement without being too form-fitting. The sleeves are a good length, and the hem provides good coverage without getting in the way. The hard shell fabric is much thinner and softer than most other shells, further enhancing movement.

This jacket feels a lot more comfortable to wear while moving than thicker hardshells on the market. We felt no resistance to fast skinning and aerobic bootpacking, and while skiing, this jacket is a dream. The panels are all cut to allow freedom of movement without adding unnecessary bulk and dangling fabric. It is loose enough to fit some mid-layers underneath, but it won't accept a huge, puffy down layer. Overall, this jacket fits well and is super comfortable to wear.

The Mammut Aenergy Air HS offers plenty of mobility for acrobatic moves in the backcountry.
Credit: Jeff Dobronyi


This jacket excels when the uphill pace quickens and you need to ditch moisture fast to keep from sweating too much. The Pertex Shield membrane breathes nicely, creating a cooler internal environment for the user. The armpit vents are huge and don't have any mesh to get in the way of air movement.

Not all hard shells are the same. Pertex Shield is one of the more breathable-feeling waterproof membranes on the market, and when we plan on moving fast and don't want our own body heat to slow us down, this is the jacket we bring.

mammut aenergy air hs hooded - long armpit vents allow tons of breathability, shown here on the...
Long armpit vents allow tons of breathability, shown here on the Mammut Aenergy Air.
Credit: Jeff Dobronyi


The Aenergy Air has decent styling as far as colors and panels are concerned, with complementary zippered accents and clean lines. The cut is also nicely tailored, which lends a refined look to this shell. It is good-looking enough for posh après-ski bars, but it can also fit into the hard-charging off-piste crowd.

The big turn-off for our testers is the large “Mammut” band down the front zipper. Mammut has a cool logo, and there's no reason why they had to tattoo their brand name right down the middle of an otherwise good-looking jacket. Nobody likes to feel like they're in a commercial, and unfortunately, that's how our testers feel when they wear this jacket. It could have easily been omitted.

mammut aenergy air hs hooded - we think the aenergy looks decent, with the exception of the large...
We think the Aenergy looks decent, with the exception of the large brand name across the front zipper.
Credit: Sam Willits


The Aenergy Air is minimally featured in an effort to keep the overall weight low. You won't find tons of pockets or a powder skirt, but there is enough to make the jacket useful for fast backcountry missions. If you are looking for a fully featured hard shell to hold your belongings while you take laps at the ski resort, this jacket won't meet your expectations

This jacket's features include one huge external chest pocket, one internal zippered chest pocket, and one small internal mesh stash pocket. The outer chest pocket is big enough to fit a pair of skins inside! The inner mesh stash pocket is too small to hold anything except a headband or beanie, and it won't hold skins or a pair of gloves. The internal chest pocket is big enough to hold a phone, a ski strap, or other small tools.

A deep chest pocket is large enough to fit a pair of gloves or skins.
A deep chest pocket is large enough to fit a pair of gloves or skins.
The interior zippered chest pocket and small mesh stash pocket.
The interior zippered chest pocket and small mesh stash pocket.
A look at some of the pockets on the Aenergy Air.

Should You Buy the Mammut Aenergy Air HS?

This jacket is perfect for those who enjoy fair weather ski touring and ski mountaineering. It is the perfect companion for spring skiing at the ski resort or as a shell for the final push to the summit of a big backcountry mission. It is also an excellent choice for multi-day backcountry ski tours like the Haute Route, where you hope for good weather and want to save as much weight as possible, but you are bound to run into a little bit of wind or precipitation along the way.

What Other Ski Jackets Should You Consider?

If you are in the market for a hardshell but want even more protection, we love the Arc'teryx Sabre Jacket for resort skiing and the occasional ski tour. For pure backcountry protection, the Arc'teryx Rush is a great choice. If you are looking for a hardshell on a budget, the REI Co-op First Chair GTX performs well at an affordable price. For a warmer insulated jacket for everyday runs at the ski resort, the Helly Hansen Alpha Lifaloft is our favorite jacket on the market, and the REI Co-op Powderbound Insulated offers the best value.

Jeff Dobronyi