Cotopaxi Allpa 35L vs. Ortlieb Atrack

When it comes to carry-on backpacks, it is essential to consider both size and function. The Cotopaxi Allpa 35L offers a hefty 35 liters of capacity, compared to the 25 liters offered by the Ortlieb Atrack. This extra space allows you to optimize its efficient layout – one major benefit of the Allpa 35L. With its dimension of 20 inches in height, 30 inches in width, and 51 inches in depth, it exceeds the size of the Ortlieb Atrack, which stands at a smaller 5 inches in height, 26 inches wide, and 56 inches deep. However, this noticeable size difference does not compromise the compatibility with airlines, as the Allpa 35L is favored by 80% of airlines, compared to the Atrack's 47%.

Let's wrap that up into bullet points:

• Size: The Allpa 35L is larger, making it perfect for larger loads.
• Capacity: The Allpa has more capacity at 35L compared the Atrack's 25L.
• Weight: The Atrack is lighter, but only just.
• Airline Compatibility: The Allpa 35L wins here, being compatible with more airlines.
• Material: The Allpa 35L's ballistic nylon beats the Atrack's PS33 in terms of durability.
• Laptop Compartment: Allpa 35L can accommodate a larger laptop.
• Reviewer Quotes: Allpa 35L regularly mentioned for its organization and versatility, while the Atrack is lauded for its protection against the elements.

Digging into the detailed aspects of each bag, the Cotopaxi Allpa 35L impresses with its rugged build, thanks to its 1680D ballistic nylon paneling. This material is praised for its durability and its ability to withstand aggressive handling and harsh environmental conditions. Furthermore, the Allpa’s thoughtful layout includes specific compartments such as a laptop slot fitting up to a 15-inch laptop, collapsible mesh laundry bag, nylon shoe bag, and a mesh water bottle sleeve, which enhance organization and accessibility of personal items. Reviewers have lauded these features, mentioning its 'intuitive and helpful' internal configuration.

On the other hand, the Ortlieb Atrack brings a different set of strengths to the table. Designed with a PS33 material, the Atrack is not as thick as the Allpa but offers excellent resistance against abrasions and puncture, and more importantly, it is highly weatherproof. Its waterproof construction makes it a more reliable companion in wet environments. Unlike the Allpa, the Atrack does not provide a laptop compartment; however, it features multiple attachment points for additional gears and accessories and a comfortable, adjustable torso harness. Reviewers praised the Ortlieb Atrack for this comfort and its unmatched protection against the elements. This makes it a formidable choice especially for hardcore outdoor enthusiasts.