Arc'teryx Cerium LT / Thorium Hoody vs REI Co-op 650 Down Jacket

The REI 650 runs $99-$149. The Arc'teryx starts at $400 and climbs past $600 depending on the model. That's not a premium — that's a different category of purchase entirely. The Arc'teryx earns its price through longevity and technical performance, but you'd need to own it for 8-10 years just to match the cost-per-year of replacing the REI jacket twice. For most buyers, that math never closes.

A Wirecutter reviewer wore the Thorium for 12 consecutive winters. That's not a marketing claim — that's documented editorial use. The REI 650 is built to a price point, and while it performs well, it won't hold up to a decade of hard use the way Arc'teryx construction does. If you're the kind of person who keeps gear for a long time and maintains it properly, the Arc'teryx actually becomes cost-competitive over a long enough horizon.

Arc'teryx uses higher fill power down, which means more warmth per ounce and a smaller packed size. The REI 650's lower fill power translates directly to a heavier, bulkier jacket — fine for throwing in a car or wearing around town, but a real penalty if you're stuffing it into a 30-liter pack for a weekend trip. For backpackers and climbers, this difference is felt on every carry. For commuters, it's irrelevant.

Arc'teryx's sizing skews toward a narrow, athletic fit — great if you fit the mold, frustrating if you don't. The REI 650 comes in men's, women's, plus women's, and extra-tall men's, which is genuinely unusual in the down jacket category. If you're shopping outside standard sizing, the REI isn't just the budget option — it might be the only option that actually fits.