Arc'teryx Men's Gamma MX Jacket - Lightweight Softshell Outdoor Jacket for Hiking, Climbing & Everyday Wear - Windproof & Water-Resistant

Created for the dynamic demands of alpine travel, the Gamma MX Jacket is a proven performer. Made from our Fortius 2.0 fabric, it provides midweight insulation, resists wind and repels water, breathes, and delivers exceptional durability. Built to handle everything from ice climbing to fall hikes, its articulated patterning and stretch combine for freedom of movement, and the regular fit allows room for light layers.

What's been updated: Updated with a PFAS-free FC0 DWR (Durable Water Repellent) treatment and a roomier regular fit for expanded layering options.

Features & Specs

Technical features

• Weather resistant
• Breathable
• Lightly insulated
• Durable

Construction

• Hardwearing Fortius™ 2.0 softshell fabric has increased warmth to weight ratio and durability, with wind resistance and a DWR finish
• Taped seams for weather resistance, a low-profile finish, and added strength

Cuff & Sleeves configuration

• Shaped cuffs with low profile elasticated cuff at wrist

Design & Fit

• Regular fit provides freedom of movement
• Garment Centre Back Length: Size M is 29"/74cm - Varies by size

Fabric treatment

• DWR (Durable Water Repellent) finish repels moisture and is PFAS-free

Hem configuration

• Adjustable hem draw cord seals out drafts

Patterning

• Articulated patterning for unrestricted mobility

Pocket configuration

• Two chest pockets with zippers
• Two hand pockets with zippers

Sustainability

• Contains materials that meet the bluesign® criteria
• PFAS (Per- and polyfluoroalkyl substances) Compliant

Size XS, S, M, L, XL, XXL

Weight 510g / 1 lb 2 oz

Fit Regular

Sizing chart

Men's
Jacket/shirt sizing chart - new sizing

Your body measurements in centimetres

Size	Sleeve	Chest	Waist	Hip
XXS	78	84	69	83
XS	81	89	74	88
S	83	94	79	93
M	86	102	86	100
L	89	109	94	108
XL	91	119	104	118
XXL	94	129	114	128
3XL	96	139	124	138

NOTE: Men's fit has been updated with a revised fit. Medium size remains unchanged. Smaller sizes are now tighter and larger sizes are now looser. Arc'teryx sizes are intended to fit the above body measurements. If your measurements are between sizes, select a larger size for a looser fit or a smaller size for a tighter fit.

Activity Rock/Boulder/Hike

Model X000008486

Manufacturing facility Youngone Nam Dinh Company LTD, Vietnam

 

Fit & Sizing

Fit: Regular

Our classic fit is cut comfortably throughout the chest, waist, hip, and thigh. It allows freedom of movement, provides shape, and layers comfortably over or under our layers.

 

Materials & Care

Materials

• Body: 60d Synthetic Stretch Softshell Nylon Plain Weave Face Poly Fleece Backer, 233gsm, DWR FC0 - 84% Nylon, 16% Elastane 100% Polyester Backing
• Origin of fabric: TAIWAN
• Origin of dyeing: TAIWAN
• May release plastic microfibres into the environment when washing

Care

• 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