Arc'teryx Gamma MX Hoody - Men's
Originally designed for the rigors of ice climbing, the warm and weather-resistant men's Arc'teryx Gamma MX Hoody has evolved to handle a range of mountain pursuits in mixed conditions.
- Gamma MX is the warmest piece in the Arc'teryx Gamma line
- Updated with a PFAS-free FC0 durable water repellent (DWR) treatment and a roomier regular fit for expanded layering options
- Hardwearing, wind-resistant Fortius™ 2.0 soft-shell fabric with an increased warmth-to-weight ratio
- Weather-resistant, breathable, lightly insulated and durable
- Taped seams for weather resistance, a low-profile finish and added strength
- Articulated patterning for unrestricted mobility
- Adjustable, helmet-compatible StormHood™ provides full coverage without impacting visibility
- Shaped cuffs with low-profile elasticized cuffs at wrists
- 2 easy-access, zippered hand pockets; 1 zippered chest pocket
- Adjustable hem cord seals out drafts
- Regular fit provides freedom of movement
Imported.
View the Arc'teryx Gamma Product LineView all Arc'teryx Men's Soft-Shell Jackets| Best Use | Hiking |
|---|---|
| Fabric | 233 g/m2, 60-denier synthetic stretch soft-shell nylon plain-weave face with polyester fleece backer; FC0 durable water repellent (DWR) |
| Hood | Yes |
| Back Length | Hip-length |
| Back Length (in.) | 29 inches |
| Gender | Men's |
| Weight | 1 lb. 4.6 oz. |
| XXS | XS | S | M | L | XL | XXL | XXXL | XS Short | S Short | M Short | L Short | XL Short | XXL Short | S Tall | M Tall | L Tall | XL Tall | XXL Tall | 28 | 30 | 32 | 33 | 34 | 36 | 38 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chest | 33 | 35 | 37 | 40 | 43 | 47 | 51 | 54.5 | 35 | 37 | 40 | 43 | 47 | 51 | 37 | 40 | 43 | 47 | 51 | |||||||
| Sleeve Length | 30 | 31.5 | 32.5 | 34 | 35 | 36 | 37 | 38 | 32 | 33 | 34 | 35 | 36 | 37 | 33 | 34 | 35 | 36 | 37 | |||||||
| Waist | 27 | 29 | 31 | 34 | 37 | 40.5 | 44.5 | 48.5 | 29 | 31 | 34 | 37 | 40.5 | 44.5 | 31 | 34 | 37 | 40.5 | 44.5 | 30 | 32 | 34 | 35 | 36 | 38 | 40 |
| Hip | 32.5 | 34.5 | 36.5 | 39.5 | 42.5 | 46.5 | 50 | 54 | 34.5 | 36.5 | 39.5 | 42.5 | 46.5 | 50 | 36.5 | 39.5 | 42.5 | 46.5 | 50 | 35.5 | 37.5 | 39.5 | 40.5 | 41.5 | 43.5 | 45.5 |
| Inseam | 31 | 31 | 31.5 | 32 | 32.5 | 33 | 33 | 29 | 29.5 | 30 | 30.5 | 31 | 31 | 34.5 | 35 | 35.5 | 36 | 36 | 31.5 | 31.5 | 32 | 32 | 32 | 32.5 | 33 |
Sizing Notes
Measurements are stated in inches unless otherwise indicated.
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Really like
The 24-year-old new gamma mx is more fit in design. The L size of 180/155 kg makes the upper body fit and comfortable. Compared with the L size of gamma hoody, this length is more suitable. Similarly, the length of L size gamma hoody is two fingers longer than this. The two versions are different. The gamma hoody fabric on the fabric will be more wear-resistant. The existing fabric of gamma mx is soft and breathable, and the gamma hoody version is more outdoor. The upper body feels light and breathable, and it is not so thick to the touch, but you can feel the rapid increase in temperature behind you.
A very nice jacket.
I’ve been living in the Gamma MX Hoody since October, and it’s the first jacket I reach for whether I’m heading to the local crag or just grabbing groceries in sideways sleet. The Wee Burly Double Weave doesn’t look techy—more like a beefy work shirt—but it shrugs off wet snow and chalk dust with the same indifference. I was skeptical about the lack of a membrane, yet the thing somehow blocks wind while still dumping heat when I’m thrutching up a greasy off-width. Fit is trim enough that my harness doesn’t ride up, and the StormHood swallows a helmet without turning me into a bobblehead. Only nitpick: the chest pocket zipper is a hair too stiff for one-handed use with gloves, but after three months of daily abuse it’s finally easing up. Worth every penny; I’ll be buried in this thing.
Stylish, Cozy & Worth It
This coat is my new favorite. Its tailored design and neutral shade pair effortlessly with any outfit, while the thick fabric keeps me warm in cold, windy weather. The soft lining feels great, and the sturdy zippers/pockets add practicality.It works for work, hikes, or dinners—no bulk, so layering over sweaters is easy. Minor con: it’s a bit heavy, but that’s a small price for the warmth.
A super comfortable soft shell, cost-effective
A must-have item for autumn and winter. The fabric is comfortable, warm, and the first choice for light outdoor. I like it very much. I look forward to selling more good products in REI.
Lots of changes from the 2020 product.
Out of the box, the Gamma MX Hoody is like most Arcteryx gear I've purchased. Well designed with high end materials and construction. What's from 2020 Gamma MX jacket that I liked so much that I bought two of and wear daily year round? The material. I love the old Gamma MX. I'll circle back once I use the redesigned 2024 product with an updated review. What else changed? Cuff design. These look ok and incorporate an elastic product, but the old ones held up in daily wear and still work well after 3 plus years. The fit is said to be different as well. But after a 50 pound weight loss and ordering a size smaller, I'm not a good judge at this point.
Great all around hoody! It's GAMMA time!
This new GAMMA MX HOODY is great! The Black Sapphire colour is nice and modern especially for our fall season. I just got this jacket a few days ago and I really like the way it fits so far. The new soft shell material feels better than previous models and wearing it on both sunny and rainy days really holds up nicely. As for the fit, it's roomy enough for a thicker sweater and warm enough for a t-shirt. The only thing I wish it adopted from other models of this price point is an inner and arm pocket as well. Lastly, this jacket is perfect for our local Vancouver fall weather and I am hoping they stock up soon so I can get another colour for the winter/spring!
Arc'teryx Gamma MX
The Gamma MX Jacket strikes a perfect balance between insulation and breathability. Made from a softshell fabric, it provides ample warmth without sacrificing mobility. I appreciate how it blocks wind effectively, making it a reliable option on chilly days. Whether I was ascending a steep trail or setting up camp in the evening, this jacket allowed for freedom of movement while still keeping me warm.
Almost Perfect - Needs Better Fit in Armpits
Overall, this is a fantastic hoody - great for cold-weather activities and daily commuting. The materials, construction, and overall fit are excellent. However, there’s one significant issue: the fit around the armpits is uncomfortably tight. It pushes up and creates noticeable pressure and irritation, which becomes distracting over time. Feedback for the design team: This seems to be a recurring concern with the Gamma MX, as others have pointed it out as well. Slightly loosening the cut around the shoulders / armpits would make a big difference in comfort without compromising the performance or fit of the hoody. It shouldn’t feel like it’s constantly rubbing or pressing against that area.
Versatile Softshell That Performs in the Wild and
As an avid hiker and weekend climber, I’ve been wearing the Gamma MX Hoody for the past few months through unpredictable weather in the Pacific Northwest—and it’s quickly become my go-to outer layer. The Fortius™ 2.0 fabric hits the sweet spot: it’s breathable enough for uphill grinds but provides just the right amount of wind resistance and warmth for summit breaks. The stretch is fantastic, especially for scrambling or setting gear—no restriction at all. I’ve even worn it casually in the city on colder days and got compliments for the minimalist design and slim fit. Pockets are well-placed (I can access them with a harness), and the helmet-compatible hood is a huge plus. It's also surprisingly water-resistant for a softshell—I stayed dry in light drizzle without reaching for my shell. If you’re looking for one jacket that bridges alpine performance with everyday functionality, this is it. Arc'teryx nailed it again.
Agree with the other reviews
I unfortunately did not read the reviews before buying a new Gamma MX hoody. I had one I purchased 10 years ago in grey and decided I wanted it in Black instead. I should have realized something was up when I was able to sell my old jacket for nearly the same price as a new one. The new one does still look good and I get compliments on it, but it doesn't feel as easy to wear now that the cuffs are longer and the fit is bigger. It's especially noticeable with the front chin cuff. I used to wear my old one zipped all the way up all the time. But, with this jacket it's too high and baggy.
Hello, thank you for sharing your experience with our Gamma MX Hoody. We understand how frustrating it can be when sizing does not match expectations, especially when you've had a great fit in the past. Recent sizing revisions have made smaller sizes a bit smaller, while the medium has remained consistent. Larger sizes are slightly bigger, which may contribute to the differences you're noticing. We recommend taking your measurements and comparing them to our sizing chart on our website for the best fit, as the sizing chart provides approximate guidelines based on body measurement. Your feedback is invaluable and we appreciate your insights on the fit!