Cotopaxi Allpa 35L vs. Boundary Supply -- Prima System Modular Travel Backpack

Comparing two travel backpacks, we have the Cotopaxi Allpa 35L and the Boundary Supply Prima System Modular. The Allpa 35L at 20 inches tall, 30 inches wide, and 51 inches deep, offers ample space for travellers, while still complying with 80% of airline carry-on regulations. It weighs around 1.5 pounds, light for its capacity. This backpack doesn't skimp on durability either, made from tough 1680D ballistic nylon paneling. It also houses a compartment that can house a 15-inch laptop. Travelers commend its practical design and simple yet robust features.

On the other hand, the Prima System Backpack from Boundary Supply gives a unique approach to travel bags with its modular design. Slightly smaller at 13 inches tall, 49 inches wide, and 28 inches deep, it is still compatible with 98% of airline carry-on regulations. It weighs a negligible 0.1lbs less than the Allpa. The 22-liter capacity might seem less, but its customizable nature adds flexibility. Made from a complex blend of Nywool, Nylon, and Kodra Nylon, the bag is lauded for its durability. The Prima also features a compartment that can contain a 17-inch laptop, subtly edging out the Allpa 35L in this aspect.

Here's a quick rundown for comparison:

• The Allpa 35L is larger compared to the Prima System Backpack
• The Allpa 35L is slightly heavier than the Prima System Backpack
• The Allpa 35L can store a 15'' laptop, whereas the Prima System Backpack can accommodate a 17'' laptop
• The Allpa 35L is made from 1680D ballistic nylon, while the Prima System Backpack comprises Nywool, Nylon, and Kodra Nylon
• The Allpa 35L has a higher capacity, 35L, compared to 22L for the Prima System Backpack
• The Allpa 35L fits into overhead compartments of 80% of airlines, but Prima System Backpack ticks this box for 98% of airlines

Reviewers often commend the Allpa 35L as an ideal backpack for budding world travelers. It also gained its reputation as a favorite pick for those seeking a combination of simplicity, comfort, durability. The Prima System Backpack, well-regarded for its security, durability, and efficiency, is a hit among both commuters and photographers. Despite its smaller size, it remains a popular choice due to its sturdiness and quality of materials.

When it comes down to add-ons, both bags offer enticing features. The Allpa 35L throws in a rain cover to protect the bag and its contents, coupled with comfortable should straps, adjustable sternum straps, and a hip belt. It also provides a collapsible mesh laundry bag, nylon shoe bag, and mesh water bottle sleeve as bonus accessories. The Prima System Backpack retorts with an included organizer and a camera case, with its high adaptability and sustainable, high-quality materials being its key selling factors. So, whether you’re prioritizing size or customization, either of these backpacks could be the ideal travel companion for your needs.