Question 1

What temperature range does one recommend wearing this upto? Can it easily keep one warm until -10c?

Amelie, Arc'teryx Guest Services · Accepted Answer

Hello Sarish, thank you for your question. We do not rate our garments for specific temperature ranges, as comfort and warmth can vary significantly from person to person based on factors such as activity level, layering, weather conditions, wind exposure, and individual cold tolerance. We recommend referring to our Layering Guide for tips on building an effective layering system based on your planned conditions and activities: https://arcteryx.com/ca/en/shop/layering-guide/. We hope this helps!

Question 2

Hi! I own an older Gamma MX Hoodie that needs to be replaced now. Probably it's from 2020. It used to be orange but now it's very bleached from hundreds of days at high altitude :-)
Can anyone tell me if the fit has remained about the same? Size S. Cheers

Helio, Arc'teryx Guest Services · Accepted Answer

Hi there, thank you for reaching out. We're glad to hear you've gotten plenty of good use out of your Gamma MX Hoody! Since 2020, the  men's fit has been updated with a revised fit. Medium size remains unchanged. Smaller sizes are now slightly tighter, and larger sizes are now slightly looser. For your reference, here are the measurements of the FW20 Gamma MX Hoody (model: X000004949) compared to the current FW26 Gamma MX Hoody (model: X000008485) in size small:

FW20 Gamma MX Hoody
Chest Width: 113cm
Waist Width: 103cm
Center Back Length: 71.7cm

FW26 Gamma MX Hoody
Chest Width: 109.4cm
Waist Width:  101.4cm
Center Back Length: 70.5cm

Please don't hesitate to reach out to our Guest Services team if there's anything else we can help with.

Question 3

Hi. May I know the measurement of size XS and S? 
Thanks.

Helio, Arc'teryx Guest Services · Accepted Answer

Hi Jeff, thanks for reaching out! Please find the key measurements for the Gamma MX Hoody in sizes XS and S below:

Size XS
Chest Width: 104.4cm
Waist Width: 96.4cm
Center Back Length: 69.2cm
Sleeve Length (from center back neck to shoulder point to bottom sleeve edge): 84.4cm

Size S
Chest Width: 109.4cm
Waist Width: 101.4cm
Center Back Length: 70.5cm
Sleeve Length: 86.9cm

Question 4

Hey. Just wondering if you could help me out choosing the right size for the Gamma MX. I'm 170cm and 69kg. Planning to wear it over a t-shirt, but don't want it to be very tight at the torso area.

Helio, Arc'teryx Guest Services · Accepted Answer

Hi there, thank you for reaching out! Based on height and weight alone, it’s tough to recommend an exact size for the Gamma MX Hoody since fit preferences can vary, especially if you prefer a little more room in the torso. The best way to find the right size is to compare your body measurements with the Gamma MX Hoody measurements below. Based on your height and weight, sizes XS, S, and M are the most likely options. If your measurements are between sizes, select a larger size for a looser fit or a smaller size for a tighter fit.

Size XS
Chest Width: 104.4cm
Waist Width: 96.4cm
Center Back Length: 69.2cm
Sleeve Length (from center back neck to shoulder point to bottom sleeve edge): 84.4cm

Size S
Chest Width: 109.4cm
Waist Width: 101.4cm
Center Back Length: 70.5cm
Sleeve Length (from center back neck to shoulder point to bottom sleeve edge): 86.9cm

Size M
Chest Width: 117cm
Waist Width: 109cm
Center Back Length: 73cm
Sleeve Length (from center back neck to shoulder point to bottom sleeve edge): 90cm

Please note that we offer free shipping and free returns within our authorized return window, so you’re welcome to order multiple sizes, try them on at home, and return any that don’t work—completely free of charge. We hope this helps!

Question 5

Can it be sprayed with a water repellent?

Luna · Accepted Answer

Hi there, thank you for your question. The Gamma MX Hoody is designed as a warm, durable softshell for mixed conditions, and its Fortius™ 2.0 fabric comes finished with a DWR treatment. While you can use a durable water repellent spray to renew this treatment, the jacket itself is water‑resistant rather than waterproof. We hope this helps!

Question 6

How should this jacket be cleaned to keep it in proper condition?

Seymour, Arc'teryx Guest Services · Accepted Answer

Hi there, thanks for reaching out. We've included the care instructions for the Gamma MX Hoody below. For more information, please visit our Product Care page here: https://arcteryx.com/us/en/help/product-care

Gamma MX Hoody Care Instructions:

Machine wash gentle low
Tumble dry permanent press low
Do not bleach
Wash dark colours separately
Do not dry clean
Iron low
Do not use fabric softener
Double rinse

Question 7

is this jacket waterproof?  Gamma MX Hoody

Seymour, Arc'teryx Guest Services · Accepted Answer

Hi Stan, thanks for reaching out. The Gamma MX Hoody is a warm, highly durable softshell hoody designed for mixed conditions. It is made with Fortius™ 2.0 softshell fabric, which is durable and weather-resistant but not waterproof. If you're looking for a fully waterproof option, we recommend looking into one of our jackets that is made with GORE-TEX. We hope this helps!

Question 8

Quel est l'indice schermerber?

River, Arc'teryx Guest Services · Accepted Answer

Bonjour, bonne question! L’indice Schmerber est une mesure que nous utilisons uniquement pour nos produits en GORE-TEX, qui affichent tous une imperméabilité de 28 000 mm. Comme la Gamma MX n’est pas une veste en GORE-TEX, elle n’est donc pas testée selon l’indice Schmerber. Son tissu softshell est conçu pour offrir une bonne protection coupe‑vent et déperlante, mais pas une imperméabilité comparable à une membrane GORE-TEX.

Question 9

Pour du ski alpin, quelle température est adaptée pour cette veste ? En ski rando ? Merci :)

River, Arc'teryx Guest Services · Accepted Answer

Bonjour Vivi, la veste Gamma MX est conçue pour des activités à haute intensité comme le ski de randonnée, où la gestion de l’effort et du vent joue un rôle plus important que la température elle‑même. Son tissu Fortius™ 2.0 offre un équilibre entre protection coupe‑vent, déperlance et respirabilité, ce qui permet à la veste de s’adapter à une grande variété de conditions. Comme la perception de chaleur est propre à chacun — selon le niveau d’intensité, l’humidité, le vent et le rythme de l’activité — il n’est pas possible de recommander une température précise. L’objectif de la Gamma MX est plutôt d’accompagner efficacement les mouvements et de réguler la chaleur lors d’efforts soutenus en montagne.

Question 10

Is this jacket suitable for skiing?

Luna · Accepted Answer

Hi there, thank you for your question and for checking out the Gamma MX Hoody! Built with our Fortius™ 2.0 fabric and a poly fleece backer, it’s a wind‑resistant, water‑repellent stretch softshell that balances light insulation and durability, and also features a helmet‑compatible StormHood™. The Gamma MX was originally designed for the demands of ice climbing and has since evolved to handle a wide range of mountain activities. While it’s not specifically designed for skiing, some guests do use it for that purpose. Just keep in mind that it’s a softshell, so it will be weather‑resistant rather than weatherproof like a GORE‑TEX shell. If you’re looking for a ski‑focused softshell, the Allium Insulated Jacket could be a great option. It’s a freeride insulated softshell featuring a durable 50D nylon outer, an air‑permeable liner, and stretch Coreloft™ insulation for unrestricted freedom on both uptracks and descents. We hope this helps!

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