Arc'teryx Men's Gamma MX Hoody

Priced: $209.99 - $350.00 Rated:   - 5 stars out of 5 by 16 reviews.
Arc'teryx Gamma MX Hoody - Wind resistant and breathable, the Arc'teryx Gamma MX Hoody Jacket is perfect for alpine climbing when weather protection and breathability are important. The Arc'teryx Gamma MX Hoody Jacket features Fortius™ 2.0 for air-permeability and 4-way stretch and light insulation with mid-weight 4-way stretch fleece. The Gamma MX Hoody Jacket has a helmet compatible Storm Hood™ and a long torso length to fit comfortably under a harness. Ideal for alpine climbing when the weather is cool and wind resistance and a light DWR finish is all you need.


  • Soft brushed-lined collar


  • Lightly insulated


  • Long torso length slides over the top of your pants to help keep the elements out

Weather and Wind:

  • Wind resistant
  • Full front zip with wind flap
  • Snow-shedding


  • Molded zipper garages
  • Corded zipper-pulls reduce noise and are easy to grab


  • Stretch-woven cuffs
  • Fortius 2.0–53% polyester, 27% nylon, 20% spandex
  • Mid-weight Fortius 2.0 softshell fabric with DWR finish
  • Fortius 2.0 synthetic fabric insulates for warmth, dries quickly, and allows moisture to move away from layers underneath
  • Laminated hem
  • DWR finish (Durable Water Repellent) helps bead water from fabric surface
  • Drop back hem
  • DWR coating allows the fabric to repel light moisture
  • Moisture-resistant outer face fabric
  • Trim fit keeps this jacket close to your body for warmth, and gusseted underarm construction allows for full range of motion
  • Adjustable hem drawcord


  • Anatomical shaping for fit and comfort
  • Athletic fit, hip length
  • e3D patterning brings an additional level of articulation to the fit of this hoody—articulation designed specifically for each intended activity (climbing, skiing, etc)


  • Breathable


  • Storm hood easily stretches over a ski or alpine climbing helmet


  • Two hand pockets, two chest pockets and a laminated sleeve pocket with laminated zipper


  • No-lift gusseted underarms
  • Mid weight softshell sheds precipitation and provides warmth
  • Helmet compatible StormHood
  • Articulated patterning and gusseted underarms for freedom of movement
  • Articulated elbows

The Arcteryx Men's Gamma MX Hoody is an incredibly comfortable soft shell mid-layer. Offering great mobility, wind resistance and warmth while being exceptionally breathable, the Fortius 2.0 textile fabric is stretchy and air permeable, perfect for tons of conditions/activities. Sporting an athletic, hip-length fit with anatomical shaping, articulated elbows and gusseted underarms, the Gamma MX Hoody will fit you like a glove. Superb as an insulating layer on mountain expeditions, or on a trip to the zoo in the fall to see what the bears are up to (I swear, they're always up to something), this jacket will do it all.
The Gamma MX Hoody by Arc'teryx is a breathable and wind-resistant hoody with light insulation. It is perfect for alpine climbing because of its durability and anatomical shaping. This hoody is not waterproof but it does have moisture shedding and moisture wicking fabric. It has a soft lined collar and stretchy cuffs to keep drafts out. The Gamma MX also has a laminated hem with an adjustable drawcord. It has plenty of storage space, including two chest pockets with hidden zippers, two zippered hand pockets and a laminated sleeve pocket.

Christy Sports

Arcteryx Gamma MX Hoody - Men's:  This wind-resistant, breathable hoody is an awesome addition for alpine specialists looking for enhanced mobility. A tough, highly wind-resistant outer face sheds moisture and a light fleece backer adds warmth while wicking away moisture.

Technical Features.
Moisture-resistant outer face fabric.
Lightly insulated.
Wind resistant.
DWR finish (Durable Water Repellent) helps bead water from fabric surface.
Anatomical shaping for fit and comfort.
Articulated elbows.
No-lift gusseted underarms.
Hood Configuration.
Helmet compatible Storm Hood™
Collar Configuration.
Soft brushed-lined collar.
Cuff & Sleeves Configuration.
Stretch-woven cuffs.
Hem Configuration.
Drop back hem.
Adjustable hem drawcord.
Laminated hem.
Pocket Configuration.
Laminated sleeve pocket with laminated zip.
Two hand pockets with zippers.
Two chest pockets with hidden zippers.

Move freely in mixed weather conditions while you're wearing the Arc'teryx Men's Gamma MX Hoody. Articulated arms and a trim fit keep this midweight layer close to the body without restricting movement when you're alpine climbing or sliding up a skin track deep in the mountains. More versatile than your baselayer and more breathable than your storm shell, this jacket will be the one you live in the most, even if there's a little light precip falling from the dark clouds above.


Soft shell jackets are the go-to garment for a wide variety of high-output winter activities, from fast hiking and snowshoeing to cross-country skiing, all thanks to their unique blends of weather protection and temperature regulation. The Arc'Teryx Gamma MX hoody takes all of the characteristic advantages of a softshell and implements them with the distinctive blend of high-quality materials and thoughtful design that has made Arc'Teryx famous. 

The Arc'teryx Gamma MX Hoody for Men is a good choice for those needing some resistance to combat the outdoor elements.
Moisture resistant outer face fabric.
Snow shedding and well ventilated.
Lightly insulated to keep you warm.
Durable and Wind resistant.
This hooded jacket has all of the ideal features you're looking for in a lightweight jacket.

Oregon Mountain Community
The Arc'teryx Gamma MX Hoody is highly wind resistant, water resistant and breathable. When you need protection from the elements during an aerobic activity this softshell hooded jacket will breath and move with you.

Mountain Gear
With a tough face and a soft backer the Arc'teryx Gamma MX Hoody is perfect for your alpine pursuits.
Wind-resistant, breathable hoody that's perfect for alpine specialists looking for enhanced mobility.
Moisture-resistant, wind-resistant outer face fabric that's breathable and durable also.
(Durable Water Repellent) helps bead water from fabric surface.
Anatomical shaping for fit and comfort.
Articulated elbows and no-lift gusseted underarms.
Helmet compatible Storm Hood™.
Soft brushed-lined collar.
Stretch-woven cuffs.
Laminated, drop back hem with adjustable drawcords.
Laminated sleeve pocket with laminated zip.
Two hand pockets with zippers.
Two chest pockets with hidden zippers.
160 g/m² 49% polyester, 35% nylon, 16% spandex four-way stretch fleece.
Machine wash cold, tumble dry low.
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Average Price History: Price History
Review RatingNumber of Reviews
Also available for: Women
Available Color(s):Blackbird, Saguaro Green, Summit Sky
Back Length:Hip length
Closure:Full Zip
Cuffs:Stretch-woven cuffs
Fabrics/Materials:Nylon, Spandex
Gusseted:Gusseted underarms
Hem:Drop back, laminated hem w/ adjustable drawcord
Insulation :Lightly insulated
Length:30 in
Material:53% Polyester/ 27% Nylon/ 20% Spandex
Pockets:Two hand pockets, one chest pocket, laminated sleeve pocket
Sizes:S, M, L, XL, XXL
Snowskirt :No
Waterproofing :DWR finish (Durable Water Repellent)
Weatherproof Material:Fortius 2.0
Weight:685 g / 1 lb 8.2 oz
Weight (M):24 oz / 687 g
Compare specifications to related products.

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Arc'teryx Gamma MX Hoody Reviews:

Positive Reviews:

I bought the Gamma MX thinking it was going to be a do-all soft-shell as it didn't have some laminated membrane reducing breathability as so many do these days. I'm a stocky guy and put out a lot of heat when in the mountains, so breathability is more of a priority with me than some of you more fit/trim guys.
First off, the Gamma MX is definitely Arc'teryx in terms of quality/finish. The materials are top notch, and the workmanship is everything you'd expect from them. The fit is perfect for what I believe to be the intended use of the jacket. Nice true athletic fit with very little excess bulk. The hood easily fits a helmet of your choice and has enough adjustment to fit your bald head just as effectively as a helmet. Pockets galore on this thing! (2 hand warmer, 2 chest, and a sleeve pocket)
This jacket as many others have commented/reviewed simply have difficulty finding a place for this jacket. I can see how that is, as even with my emphasis on breathability this jacket still leaves a bit on the table I believe. I've held off reviewing this jacket until I expanded my soft-shell inventory so I'd have a better idea of where this jacket fits into the picture and I'd offer the following:
This jacket is for those of you *ON THE MOVE* in colder conditions. The air permeability helps regulate your temps, and the fleece lining will keep the bitter chill off you during map checks/equipment adjustment/ect. This is not your "do it all" soft-shell. But the very things that keep it from being that, means it excels at what I believe it was designed to do.
I find it most useful with a lightweight/mid-weight wool base layer underneath, and a insulation layer & hardshell (if things are suspected to get burly) in the pack. I typically stuff a Patagonia Nano Puff and Alpha SV in the pack to augment this shell.

Justin Hebert at on 12/20/2013

I use this jacket in two ways. The first as the outside layer over my Atom LT when I go to my office job M-F in the winter. With my dress shirts, this combination keeps me warm. The second is when I'm doing any outside activity, this goes in my bag and is used when I'm getting cold. When I'm hiking in cold/windy weather, this thing keeps me regulated incredibly well. The wind mostly stays out; if I'm running warm, I just unzip some of the pockets and my temperature stays comfortable. The storm hood also stays secure and keeps me warm, without decreasing my head movement much. I also stay pretty dry. Great pockets and zips to secure the jacket in various places (e.g. hood, waist). It also keeps light precipitation out. I'm pretty amazed by this jacket and how it keeps my temperature nice while we're working out in the Rockies! The photo is from the summit of Flattop Mountain in July - high winds, cold, temperature in the 40's, and my torso/head felt great!

dkep598324 at on 07/07/2013

This is the most wonderful jacket I have ever worn. 6'3", 200lbs, and a large fits perfect in the sleeves, torso, everywhere... I have a lichen, and the color is simply beautiful. If you can't tell, I have a crush on this jacket and would give it 15 stars if I could. It breathes well and sheds light rain and wind with ease. The durability is unrivaled, and the details in the stitching give me confidence that I'll be wearing this piece for a long time. I even climb in this jacket and still have no abrasions or rips anywhere on the jacket. I own 4 other jackets, and this cannot be beat. The hood is large to accommodate a helmet, yet it still looks good and not too large when worn without a helmet. The zippered pockets are very useful and are all located in creative and convenient places. If you are looking for a softshell, look no further: the Gamma MX hoody is worth EVERY penny!

Tighe Cordry at on 03/02/2013

This is kind of the original game changer in my mind when it comes to softshells. This thing is warm, nearly windproof, stretchy and fits nearly everyone incredibly well (although some of the products now coming out of china have a more boxy fit. Mine is from Canada and has their classic trim tailored fit). At 24oz it's a bit too heavy for serious climbing but for a day at the local ice flow or a nice day resort skiing, it's really fantastic. The Hood is classic big arcteryx and with pockets everywhere, you can stash just about anything you'd want on your body. It'll shed wind and snow very easily. Rain or wet snow will wet it out in short order. Put one on and see what everyone is raving about. This thing feels great!

jrc at on 07/19/2013

This is my 3rd Gamma MX (Own the Polartec version and now a newer MX hoody and MX Jacket). The newer fortius II fabric seems to wear much better than the Polartec powersheild. Its seems more durable after 1 years of constant use. It has a bit more insulating loft but sacrifices some windproofness. I cannot tell the difference in breatheability between fortius and Polartec.
The over fit has improved and I like the use of the same fortius fabric on the chest pockets. Love the 4 pocket design (Arcteryx needs to make softshell's with more pockets). Lastly the length could be a tad longer in the front (the drop in the rear is perfect in length). 5'10" 165 lbs and a medium is a perfect fit.

PAUL UDOVIC at on 03/19/2013

Awesome jacket

I just got this jacket and love the way it fits and feels. Haven't had a chance to put it through its paces, but expect it will do great. Really like the fit -- works well under a harness. The chest pockets are great for when you have a harness/pack on and the side pockets are great for around town. The collar stands up nicely to protect you from the wind. The hood is plenty big for a helmet, but doesn't overwhelm when you don't have one on.
Lawman at Mountain Gear on 02/02/2013

I bought this along with the Alpha LT hardshell jacket and was very impressed. First off, the athletic cut is amazing! Fits like a glove! It's nice to be able to raise both arms while having a jacket that will maintain waist level. A necessity on long ice climbs. It also has all the features any alpinist can seriously appreciate while omitting all the fancy bells and whistles you don't need. Super light, super rugged, a must have for any serious alpine enthusiast!!!

Jared Lee O Davis at on 01/25/2014

This is an amazing jacket. I've taken it ice climbing in Ouray CO, trad climbing in Moab and like all Arc'teryx items it can really stand the test of time. Its an article of clothing that makes the whole adventure or trip completely awesome. When ice climbing or climbing in general its not to hot yet sheds water or snow super efficiently. Amazing Jacket!!!

jscp1002235 at on 01/15/2014

Great Softshell. It is surprisingly warm. I don't like it as much as an acto mx hoodie for aerobic activities, but around the town and bad weather it does better. I am 6'1" 165 lbs and a large fits me very well. The chest pockets are a little awkward in configuration, but that is a small gripe. Overall great arcteryx quality you can expect.

Alex at on 10/01/2013

Right on the Money.

comfortable. soft + cozy interior. versatile warmth/weight/weather-resistant combination. athletic cut that's sized to layer over others. whopping and highly adjustable hood with a nice little visor. feel like zipping on a little fortress:) first quality construction you would expect from these guys.
go forth at Paragon Sports on 12/12/2013

Negative Reviews:

Bought this in October 2013. On day 3 of ownership i wore it on a day out hiking. Within 6 hours of it being beneath my rucksack hipbelt it bobbled/pilled on the inside, on the mesh pockets. Beneath my Gamma MX was my arcteryx baselayer. Not good at all.
I should have learned my lesson from last years saga of my Strato hoody. That bobbled after its first wash. After being lectured into how to care for arcteryxs' products, my replacement bobbled, before its first wash. So it wasn't a washing/care issue.
General everyday friction is enough to damage the clothing.
My Covert hoody that is 4 years old shows very little sign of bobbling. So all i can think is that their materials that they use now, are sub standard.
I won't be wasting any more of my hard earned money on overpriced, below average, tat.
People should be aware that very few items are actually made at the arcteryx Canadian factory. Everything else is made in China, like this over priced and over rated hoody.
Why oh why can i not give a zero star rating. Thats all this is worth.

Martia Lant at on 12/30/2013

Neutral Reviews:

At first it was a little hard for me to place this jacket in terms of best use. It does not have the waterproofness of a hardshell, nor the windproofing of a windtopper softshell. In fact the Gamma MX is not just breathable, it is extremely air permeable. I have finally concluded that the Gamma is a good warm piece to wear when the temps are low but the weather is clear. The microfleece lining keeps you warm, but the air permeability keeps you from overheating during strenuous activity. Not my favorite jacket from Arc'Teryx for technical wear, this jacket is nonetheless very comfortable to wear when conditions are good.

Mike D Hilverda at on 12/01/2013

I would hate to put a hole in this pricey piece while climbing.

ronp46239 at on 03/11/2013