Peak Design Travel Backpack 45L Review (2027)

Photographers, creators and one-bag travellers whose packing list grows during a trip and who use packing cubes or camera cubes.

Many bags claim to expand; this one earns the claim, growing from 30 litres compressed through 35 litres standard to 45 litres expanded without changing its footprint in the bin. The practical effect is a bag that flies safely outbound at standard size and still swallows souvenirs, extra layers and gifts on the way home. Owners who travel with variable loads describe the expansion zips as the feature that ends the second-bag habit.

Opening from the rear, against the harness side, means the bag opens flat on a bed while the straps stay clean underneath, and the full-length UltraZip gives access to the entire main compartment rather than a top slice of it. Inside, a zippered partition and Peak Design packing units divide the space into camera, clothes and tech zones that can be rearranged between trips. Without cubes the bag is one big boxy space; with them it is the most organised pack in this guide.

The honest costs are weight and money. At 2.05 kg empty, the structured shell and hardware add up before anything is packed, and on long walks that weight is felt. Underpacked, the same structure holds a boxy shape that looks half empty. And the packing units that make the system sing are sold separately, so the total system price sits well above the bag alone. Buyers who pack light and never use cubes should buy a simpler bag instead.