Arc'teryx
Arc'teryx Gamma MX Hoody
76B-TIERhigh Confidence
The warmest and most durable jacket in Arc'teryx's Gamma softshell line. Fortius 2.0 fabric with 16% elastane delivers four-way stretch, superior abrasion resistance, and effective wind blocking. Fleece-lined interior adds cold-weather warmth. Originally designed for ice climbing, it excels in mixed alpine conditions. Users report exceptional longevity — 4 to 10+ years of heavy use with minimal wear. Covered by Arc'teryx limited warranty with ReBIRD repair program.
118verified reviews analyzed
86%positive
76
B-TIER/ 100Good
Material & Build21/25
Fortius 2.0 softshell with 16% elastane provides four-way stretch, superior abrasion resistance, and effective wind blocking. FC0 PFAS-free DWR treatment. Fleece-lined interior for warmth. Helmet-compatible StormHood with articulated fit. Gusseted underarms and articulated elbows. Deducted for 1 lb 2 oz weight being heavy for backcountry use, limited breathability above freezing, and face fabric wetting out in sustained rain.
Warranty & Support22/35
Arc'teryx Limited Warranty covers manufacturing defects for practical product lifespan with repair, replacement, or voucher. ReBIRD program provides in-store repairs (zippers, patches, buckles) and mail-in service with 4-6 week turnaround. Does NOT cover wear-and-tear, accidents, or normal use — only manufacturing defects. Paid repairs available for non-warranty damage. One user received a warranty replacement for a 16-year-old unit.
User Trust33/40
118 REI reviews at 4.3/5 stars. Switchback Travel rates it 4.4/5. OutdoorGearLab tested and rated in softshell category. Search and rescue team coordinator reports 1.5 years of use with zero warranty or wear issues. Multiple users report 4-10+ years of heavy use with no visible wear. Strong BIFL community reputation as top softshell candidate. Long-standing Arc'teryx brand heritage since 1989.
high ConfidenceUpdated Feb 2026
High
Uses Fortius 2.0 softshell fabric with 16% elastane for four-way stretch and superior abrasion resistance. Air-permeable woven textile blocks wind effectively. FC0 PFAS-free DWR treatment for water repellency. Fleece-lined interior provides insulation for cold weather. Weight approximately 1 lb 2 oz.
Source: Arc'teryx product specifications; Switchback Travel review
High
Articulated regular fit with gusseted underarms and articulated elbows enables full mobility for climbing and overhead reaching. Helmet-compatible StormHood protects without impeding peripheral vision. Originally designed for ice climbing, updated in 2025 with roomier fit and FC0 DWR.
Source: Arc'teryx product page; OutdoorGearLab review
Known Concerns4 issues reported
At over 1 lb 2 oz, the Gamma MX is significantly heavier than lighter softshells in the Gamma line. Not ideal for weight-conscious backcountry pursuits where every ounce matters.
Breathability suffers even in mild temperatures due to the fleece liner. Runs too warm above freezing and requires full front-zip venting during moderate exertion. Best suited for below-freezing conditions.
The outer fabric wets out in sustained precipitation. While it handles light drizzle and powdery snow well, it is not a substitute for a waterproof shell in heavy rain or prolonged wet conditions.
Sizing runs slightly small. Multiple reviewers report their normal Arc'teryx size feels snug, with some noting uncomfortable tightness around the armpits. The 2025 update with roomier fit may address this for newer purchases.
$400.00
Where to Buy4 retailers
| Arc'teryx | Best price | $400.00 | Visit |
| REI | Best price | $400.00 | Visit |
| Backcountry | Best price | $400.00 | Visit |
| Zappos | Best price | $400.00 | Visit |
Prices updated Feb 2026. Links may earn a commission.
Brand Profile
Arc'teryx
Founded 1989 · North Vancouver, British Columbia, Canada
Founded in 1989 in North Vancouver. Known for technical precision in outdoor gear with innovations like Down Composite Mapping. ReBIRD program offers repair, resale, and upcycling.
Warranty
Limited warranty for practical product lifespan covering manufacturing defects. Repair, replacement, or voucher at Arc'teryx discretion. Wear-and-tear, accidents, and normal use not covered. ReBIRD in-store repairs for zippers, patches, buckles. 4-6 week turnaround for mail-in service.
Brand Score
22/30
Repair Program
Yes
Parts
medium
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