8 Best 40 L Travel Backpacks 2026 in the United States

The Thule Aion Travel Backpack 40L in Nutria is designed to be a reliable companion for travelers. With a 40-liter capacity, it strikes a balance between spaciousness and manageability, making it suitable for extended trips without being overly bulky.

The backpack is made from bluesign approved, 100% recycled polyester fabrics, combined with a waxed canvas that features a PFC-free durable water-resistant coating, ensuring both eco-friendliness and resilience against the elements. Weighing in at 1.45 kilograms, it is reasonably lightweight for its size, though not the lightest option available.

Comfort-wise, the backpack can be enhanced with the addition of the Thule Aion Sling Bag, which doubles as a supportive hip belt, though this must be purchased separately. The inclusion of padded storage for a 15.6-inch laptop adds to its practicality for travelers.

The Thule Landmark Backpack 40L is a thoughtfully designed travel companion, particularly suited for those looking for a reliable carry-on option. With a capacity of 40 liters, it provides ample space for a short adventure trip while still adhering to carry-on size restrictions. Weighing in at about 1.58 kg (3.48 pounds), it's relatively lightweight, making it easier to carry for extended periods.

In terms of material, Thule is known for using durable fabrics, ensuring your backpack can withstand the rigors of travel. Comfort is enhanced by its ergonomic design, which likely includes padded shoulder straps and a supportive back panel, although these specific features aren't detailed in the brief. The backpack excels in the organization with dedicated compartments for a 15-inch MacBook and a 12.9-inch tablet, which is perfect for tech-savvy travelers. The CashStash compartment is a clever security feature, allowing you to protect valuable items like your passport and money from pickpockets. LoopLocks further enhance security by securing zipper pulls to deter theft, which is a valuable addition for peace of mind.

Access to the contents of the backpack is straightforward, thanks to its design, though the specifics of the main compartment's accessibility aren't outlined. The durability of the backpack is suggested by Thule's reputation, though it's always wise to handle it with care to extend its life. While it ranks relatively well in customer satisfaction with a 4.6-star rating, potential buyers should consider if the lack of detailed comfort features and the absence of a rain cover might affect their travel needs. This backpack is best suited for organized travelers who value security features and need a reliable, tech-friendly backpack for shorter trips.

The Thule Stir Alpine 40L is a well-designed hiking backpack that offers a solid balance of capacity and lightweight construction, weighing just 1.1 pounds. Its 40-liter capacity makes it suitable for day trips or short overnight adventures where you need to carry a good amount of gear without extra bulk. Made from tough nylon, the material is resistant to weather and abrasion, so it can handle rough outdoor conditions well.

Comfort is addressed with adjustable components that you can add or remove to lighten the load or customize the fit, plus hip belt loops for easy gear access. The backpack is thoughtfully organized with several compartments, including interior zipped mesh pockets for small items, a fast-access side zipper that lets you reach your gear without unpacking everything, and a dedicated tool garage for ice axes or skis—features that are great for outdoor enthusiasts. It also supports hydration with a reservoir sleeve and exit port, though you'll need to buy the reservoir separately.

Access is convenient due to the side zipper and shoulder strap pockets, while the underlid compression strap and storm flap provide options for attaching extra gear and keeping your pack contents dry. The limited lifetime warranty shows confidence in durability. This pack is particularly well suited for active hikers and climbers who want a lightweight, durable, and adaptable backpack with smart organization and weather protection. It may be less ideal for casual travelers who prioritize security or more traditional travel features.