Arc'teryx
Arc'teryx Thorium Hoody
73B-TIERhigh Confidence
A durable mid-weight down hoody using 750-fill RDS goose down with Coreloft synthetic insulation in moisture-prone areas via Down Composite Mapping. The 30D Arato nylon shell is twice the denier of the ultralight Cerium, reducing snags and feather poke-through. Weighs approximately 18 oz. Covered by Arc'teryx limited warranty with ReBIRD repair program. Designed as a standalone outer layer rather than a packable midlayer.
120verified reviews analyzed
86%positive
73
B-TIER/ 100Good
Material & Build20/25
750-fill RDS goose down with hybrid Coreloft synthetic insulation (80g and 140g) in moisture-prone zones via Down Composite Mapping. 30D recycled Arato nylon shell is significantly more durable than the Cerium's 15D, reducing snag and feather poke-through issues. PFAS-free DWR and bio-based liner. Deducted for 750-fill down losing loft faster than 850-fill over years of compression, and shell still relatively delicate versus hardshell fabrics.
Warranty & Support22/35
Arc'teryx limited warranty covers manufacturing defects for practical product lifespan with repair, replacement, or voucher. ReBIRD program offers in-store and mail-in repairs for zippers, patches, and buckles. 4-6 week turnaround for mail-in. Does NOT cover wear-and-tear, accidents, rips, or normal use. Weaker than Patagonia Ironclad Guarantee but real repair infrastructure exists.
User Trust31/40
4.3 out of 5 stars on REI with positive sentiment. Switchback Travel praises hybrid insulation and durability. Multiple long-term owners report 5+ years of heavy use including backpacking and mountaineering with minimal damage. Strong Arc'teryx brand heritage since 1989. Limited BIFL-specific community discussion compared to legendary products, but solid expert and user validation across multiple review sites.
high ConfidenceUpdated Feb 2026
High
Uses 5 oz of 750-fill-power RDS-certified goose down paired with Coreloft synthetic insulation (80g and 140g) in shoulders, cuffs, and underarms where moisture accumulates. Arc'teryx calls this Down Composite Mapping, ensuring warmth retention even when wet.
Source: Arc'teryx product specifications; Switchback Travel review
High
Shell is 30-denier recycled Arato nylon with PFAS-free DWR and bio-based liner from castor bean oil. The 30D shell is twice the denier of the Cerium (15D), significantly reducing feather poke-through and snag damage. Reviewers report far less feather loss than the Cerium.
Source: Switchback Travel review; outdoorcrunch.com Thorium vs Cerium comparison
Known Concerns4 issues reported
750-fill down loses loft faster than 850-fill over years of repeated compression and packing. Reviewers note insulation capability can degrade after 3-5 years of heavy use, unlike higher-fill-power down which retains loft longer.
Some reviewers report fit inconsistencies across model years, with the redesigned version running larger than previous iterations. Multiple users recommend sizing down from typical Arc'teryx sizing.
At $450 MSRP, the Thorium is more expensive than comparable down jackets from Patagonia ($329 Down Sweater Hoody) while using lower fill-power down and a heavier overall package.
Arc'teryx warranty does NOT cover wear-and-tear, accidents, rips, or normal use — only manufacturing defects. Coverage is narrower than competitors like Patagonia or Osprey with broader unconditional guarantees.
$450.00
Where to Buy4 retailers
| Arc'teryx | Best price | $450.00 | Visit |
| REI | Best price | $450.00 | Visit |
| Backcountry | Best price | $450.00 | Visit |
| Zappos | Best price | $450.00 | 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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