The Outro 40 and Outro 55 are built to solve the same problem: keeping you organized, comfortable, and fast on trail, whether you’re out for a long weekend or pushing deeper for a full week. The 40L shines as the nimble, do‑it‑all pack for shorter trips or lighter kits, while the 55L adds extra capacity without sacrificing the same clean organization and “disappearing” suspension.

Benefits

• Stay organized instead of digging in a “big hole”: both packs use a 50/50 zippered divider in the main compartment, so you can keep heavy, daily-use items low and close to your back, and lighter, compressible gear up top. That means less rummaging at camp and faster transitions on the trail.
• Access gear from the back panel, not just the top: unique rear-panel access lets you reach the lower compartment without exploding your whole pack, which is a big time saver for tents, sleep systems, or layers you want mid-day.
• Built-in “side quest” pack: the optional/removable top pocket converts into a sling bag for summit pushes, town runs, or water refills, so you don’t need to pack a separate daypack.
• All-day comfort with real load transfer: an internal wireframe suspension, padded lumbar, and adjustable torso length work together to move weight to your hips and keep the pack stable, even as you change layers or food volume over a multi‑day trip.
• Dialed fit for more body types: adjustable torso length and multiple hipbelt size options let you get a custom-feeling fit instead of “close enough,” which reduces hot spots and fatigue over big mile days.
• Smart pocket layout that keeps you moving: two large side pockets, hipbelt pockets, and harness pockets keep snacks, phone, map, and filter accessible while you hike, so you spend more time walking and less time stopping.
• Durable, trail-ready fabrics: high-density nylons, UHMWPE ripstop, and Robic fabrics in various deniers balance abrasion resistance with reasonable weight, and many colorways use deadstock/overrun materials that are easier on the planet.
• Ready for real mountain travel: trekking pole and ice tool attachment points plus an optional rain cover make the Outro line suitable from shoulder‑season backpacking to light alpine objectives.

Which pack is right for you?

Choose Outro 40 if you:

• Prefer a lighter, more compact pack that still handles multi-day trips with a dialed, organized layout.
• Run a lighter kit, carry under roughly 30 lb, or mostly do 1–4 night trips where fast travel and comfort matter more than extra volume.
• Want one pack that can handle everything from hut routes and loop weekends to minimalist thru sections.

Choose Outro 55 if you:

• Need extra room for week-long trips, shoulder-season loads, bulkier sleep systems, or group gear.
• Want the same organization and comfort as the 40, but with more headroom for food, layers, or camera equipment.
• Prefer a pack that still feels balanced and supportive when loaded up for bigger objectives.

Outro 40 vs Outro 55 details

Backpacking focused specs and use cases to help you pick the right size:

What they have in common

• Same 50/50 divided main compartment that eliminates the classic “black hole” pack.
• Internal wireframe suspension with padded lumbar for efficient load transfer.
• Adjustable torso length with multiple hipbelt sizes for a dialed fit.
• Roll-top closure plus back panel access to the rear compartment.
• Removable top pocket that converts into a sling bag for side trips.
• Harness pockets, large side pockets, and hipbelt pockets for on-the-go access.
• Durable, mountain-ready materials designed for real backpacking use.