Peak Design Travel Backpack 45L

The Travel Backpack 45L is the premium pick on our travel backpack list. It is for the traveler whose trips change shape: a weekend with a laptop one month, two weeks with a camera the next. GearJunkie named it the best overall travel backpack in its August 2026 guide, Switchback Travel ranks it second, and OutdoorGearLab gives it a Top Pick award for carrying camera gear.

It suits frequent flyers, photographers and remote workers who want protected spots for a laptop, a tablet and a camera cube, and who would rather have one bag that grows and shrinks than two bags. It is a poor match for carriers that weigh cabin bags, since the empty bag already takes 2 kg of a 7 or 8 kg allowance.

Adjustable volume is the headline. Peak Design lists three sizes: 30 L with the top compressed, 35 L at its standard carry-on size, and 45 L with the expansion zipper open. The idea is to fly at 35 L, then open it up for souvenirs or a jacket at your destination. GearJunkie found the collapse and expansion easy to use, and it praised how neatly the bag slims down.

Organization is the other strength, and it is the opposite of the Osprey Farpoint's single big cavity. The main compartment opens from the back panel like a clamshell, and a zippered mesh divider can split it in two. There is top access for a jacket, side access to reach in without opening the bag, and a front section with five zippered pockets, according to GearJunkie. The padded laptop sleeve takes a 16 in laptop and a separate sleeve holds a 10 in tablet. The side pockets stretch for a water bottle or a small tripod.

The build explains much of the weight. The shell is 100 percent recycled 400D nylon with a DWR treatment and a double poly coating, over a 900D waterproof base. Hardware is anodized aluminum and glass-reinforced nylon, and the zippers are Peak Design's UltraZips with abrasion-resistant thread. GearJunkie liked the details: shoulder straps that hide behind two foam panels closed with magnets, zipper pulls that lock through each other, and an ID sleeve on the back panel. Peak Design backs it with a lifetime warranty.

Weight comes first. Peak Design lists 2.05 kg (4.5 lb), and OutdoorGearLab and GearJunkie both weighed 4.5 lb, a pound and a half more than the Cotopaxi Allpa 35L. OutdoorGearLab called it relatively heavy and noted camera dividers cost extra.

Size needs care. At its 35 L carry-on size Peak Design lists 22 x 13 x 9.5 in, half an inch deeper than the 22 x 14 x 9 in the major US carriers publish, and the expanded bag is 11 in deep. Compressing it to 30 L only shrinks the top of the bag, according to Peak Design, so the depth at the base stays the same. On easyJet's 56 x 45 x 25 cm large cabin bag limit it fits at 35 L, but on Ryanair's and Wizz Air's priority bag limits it is too deep on paper. OutdoorGearLab likewise found its carry-on fit tight enough to need compression, and Switchback notes the expanded bag exceeds carry-on size.

The harness is built for airports, not trails. The shoulder straps and sternum strap are good, but the hip belt is a slim tuck-away strap rather than the padded, framed belt on the Osprey Farpoint 40. GearJunkie also found the side grab handles sit in an awkward place.

Against the Cotopaxi Allpa 35L: the Allpa is a pound and a half lighter and its mesh compartments save buying packing cubes, but it cannot grow past 35 L and its laptop sleeve opens from the side. The Peak Design is better for tech and cameras; the Allpa is the better value for clothes-first trips.

Against the Osprey Farpoint 40: the Osprey is more than a pound lighter by the makers' figures, sits within a tenth of an inch of the 9 in depth limit on paper and has a LightWire frame and padded hip belt for heavy loads, but it has little internal organization. Choose the Osprey for long walks and the Peak Design for airports, offices and cafes. For the full side-by-side on weight, size, harness and organization, see our Peak Design Travel Backpack 45L vs Osprey Farpoint 40 comparison.

For trips where a backpack is too small, see our checked luggage picks.

Buy the Travel Backpack 45L if you want one bag that adapts to short and long trips, protects a laptop, tablet and camera, and is built to last. Fly it at 35 L, keep an eye on depth at strict gates, and skip it if your airline weighs cabin bags or you walk long distances with a full load.