REI Co-op Backpacks

The Traverse 35 is the largest daypack in this comparison and the one that crosses into overnight territory. A 400D recycled shell over 210D ripstop makes it durable, and at 52 oz it is also the heaviest pack in the daypack group.

The Trail 25 is REI's basic day pack and the sensible default for most day hiking: $100, 25 L, 210D ripstop, and nothing clever. It sits between the Flash 22's minimalism and the Traverse 35's capacity.

The Trailmade 60 is REI's entry-level backpacking pack, built around inclusive sizing and a fully adjustable fit at a beginner-friendly price. A huge U-shaped front opening makes it one of the easiest packs to load and unload on the market.

The Flash 22 is REI's cult-classic minimalist daypack — 14 ounces, $60, and endlessly recommended as the summit pack, travel stuffable, and errand bag that happens to hike well. The removable back pad doubles as a sit pad.

The Flash 55 is REI's ultralight value play — a roll-top pack with the co-op's Packmod system of removable pockets and straps, letting owners configure or strip it per trip. It's the cheapest credible ultralight framed pack from a major retailer.

The Flash Air is REI's ultralight pack, using a shaped spring steel frame rather than stays or a hoop. It is the only pack in this group backed by a mainstream retailer's return policy, which matters more than usual in a segment dominated by made-to-order cottage brands.

The Traverse 60 is REI's full-featured backpacking pack, sitting above the budget Trailmade and below the ultralight Flash Air. At 4.5 lb it is built for comfort under load rather than for weight, and it is backed by REI's return policy.