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Arcteryx Mens Gamma MX Hoody Orion

£202.50 £270.00
25% off

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Other colours available:
Arcteryx Mens Gamma MX Hoody Blackbird
Arcteryx Mens Gamma MX Hoody Flux
Arcteryx Mens Gamma MX Hoody Orion

The Gamma MX Hoody is a technical, high performance, heavy-weight softshell that performs superbly in all winter mountain activities. Made from a non-membrane softshell fabric for enhanced breathability, weather resistance and durability.


Versatile high performance designs for diverse activities and conditions.


Weather resistant mid or outer layers with stretch. Highly breathable and abrasion resistant.


Highly durable, breathable and mobile. Best for mixed usage in changing weather conditions.

Arcteryx Mens Gamma MX Hoody Orion

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What is the Gamma MX?

The brilliant and incredibly versatile Gamma MX Hoody is one of the best mountain softshells available. It performs superbly across a wide range of conditions, fits beautifully and looks fantastic!

What is it made of?

The Fortius 2.0 fabric used to make the Gamma MX is a membrane free, wind-resistant, four-way stretch woven fabric that's been laminated to mid loft 4 way stretch fleece. So it’s very stretchy, very breathable, very tough and very weather resistant making it just about the best all mountain softshells.

What are the features?

You get a fleece lined hood which will accomodate a helmet, two hand pockets, two chest pockets, a laminated sleeve pocket and finally an adjustable hem drawcord to seal out the cold.

How does it fit?

Designed with active users in mind, the Gamma MX is close fitting with long arms and has gusseted underarm panels for completely unrestricted movement. Fitted with a helmet compatible StormHood which can be adjusted down to fit your head comfortably if you are not wearing your lid.

Where does it fit in the layering system?

For the vast majority of the time, the Gamma MX makes a perfect outer layer when moving, however it can also be used as a midlayer underneath a shell if the weather is particularly harsh, or under an insulated jacket when stopping for a lengthy period of time.

  • Tough outer fabric
  • Wind resistant
  • Water resistant
  • Brushed interior
  • Two hand pockets
  • Two chest pockets
  • Laminated sleeve pocket
  • Hem drawcords
  • Soft cuffs
Code : 19274-ORI-

Season : Sale

Weight : 0KG

Sizing Information

Arc'teryx Men's Jackets & Shirts Sizing Information

Measurements refer to body size, not garment dimensions.

  Chest Waist Hip Sleeve
X-Small 36" 29" 36" 32"
Small 38" 31" 38" 33"
Medium 40" 33" 40" 34"
Large 43" 36" 43" 35"
X-Large 46" 39" 46" 36"
XX-Large 50" 43" 50" 37"
  Chest Waist Hip Sleeve
X-Small 92cm 74cm 92cm 81cm
Small 97cm 79cm 97cm 84cm
Medium 102cm 84cm 102cm 86cm
Large 110cm 94cm 110cm 89cm
X-Large 118cm 99cm 118cm 91cm
XX-Large 128cm 110cm 128cm 94cm

Next to Skin Fit: Cut snug to the body through the entire garment to enhance moisture management and thermal efficiency.

Slim Fit: Cut slim to the body through chest, waist, hip and thigh for a low profile fit.

Regular Fit: Cut comfortably from the body through bust/chest, waist, hip and thigh for a classic fit.

Relaxed Fit: Cut loosely through the waist, hip, and thigh for a casual fit.


Measure around your chest/bust, holding the measuring tape under your armpit.


Measure around your waist at the narrowest part.


From a standing position, measure from your crotch to your ankle.


With your arms in a slightly bent position, measure from the centre of the back of your neck, along the length of your arm, to the wrist.


Measure around your hips at the widest part.

Technical Information

Weight: 565g

Centre back length: 73.5cm

Fabric: Fortius 2.0 (49% polyester, 35% nylon, 16% elastane)

Care & Advice
  • 5

    Reviewed by Piotr,  On 18/11/2017 13:21:45

    Really nice softshell jacket. I switched from Quechua Bionnassay 500 (50 quid entry level jacket) which served me well for 3 years. Gamma MX is lighter, equal warmth but I sweat less , better fit (less boxy, longer back). Hood adjustment works really well. Collar really protects from the wind. Good side pockets, can still be worn with hip belt. I really like chest pockets - use them very often for Oyster card, bank card and other small bits. With medium fleece underneath(+base layer mabe) I can go as low as 0 degrees. With only base layer I often wear this jacket when its 5-6C outside. Makes it quite good autumn jacket. Yet, I have to try it during hiking because so far it been my daily commuter jacket. So far, I used it during short light to medium rain and it sheds water well but it is not a rain jacket. I would expect it to soak in heavy downpour pretty quickly. Having read few reviews, I thing I was worried was breathability vs. being windproof. While I agree that it might be not 100% windproof (my cheap quechua might be a bit better in that regard) but it offers so much more breathability. Before, I would sweat heavily, had to take the jacket off as pit zips would not even help. Gamma MX is a totally different league. Somehow, it regulates my body temp better. I can wear it on the train. So far, I found wind protection totally adequate.
    YES Piotr would recommend this item
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    Excellent customer service. Really detailed easy to understand product descriptions on the Trekitt website, and gear reviews on the Trekitt YouTube channel made it so easy to choose the right backpack for me.
    Emily - May 2020
    Amazing service! Very helpful in regards sizing and what most matched my needs, despite this being done over the internet. YouTube videos of products being examined are very useful also. Would definitely use again, very fast and efficient delivery. Brilliant! Highly recommended!
    David R - April 2020
    Highly recommend. I usually go to the shop in Hereford as staff are alwasy very helpful and knowledgeable. So this was the first time I have purchased online and the service was just as good as the shop.
    Grizzy - April 2020


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