One side of the clamshell-style suitcase is just a large zippered compartment, this wound up being the most useful as it kept all my clothing neatly and securely in place, especially when full.

The clamshell-style suitcase has two large interior compartments along with three extra pockets, one of which is water-resistant, and the expansion zipper allows for an extra 2 inches of packing room.

The list below represents our top picks for the best carry-on backpacks in 2025.

Suitcases become cumbersome as soon as ... If it’s mainly the Allpa’s clamshell opening style that appeals to you, though, here is a worthy dupe. Just note that it’s 40 liters as opposed ...