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When comparing thule vs peak design travel backpacks, you are looking at two distinct approaches to carry-on gear. Both offer expandable capacity for flexible packing. The main difference lies in their construction and weight. Thule uses recycled polyester and waxed canvas for a broken-in look. Peak Design relies on a weatherproof 400D recycled nylon shell. These material choices define how each pack handles moisture and wear. You also see a significant weight gap between the two options.
Shell Material
100% recycled polyester with waxed canvas
400D recycled nylon canvas
Weight
3.2 pounds
2.05 pounds
Dimensions
20.5 x 13 x 9.06 inches
13 x 22 x 9.49 inches
Laptop Protection
Padded storage for up to 17 inch laptop
not listed
Access Points
Zippered top pocket
Top, side, and rear access
Choose the first if
- You prefer a bag with a broken-in waxed canvas appearance straight out of the box
- You need dedicated padded storage for a large 17 inch laptop
- You want a removable TPU rolltop to isolate odors or moisture
Choose the second if
- You prioritize a lighter pack at 2.05 pounds for easier carrying
- You need side pockets that expand to hold bottles or tripods
- You want a weatherproof shell with TSA-friendly top and rear access
Verdict
Choose the Thule Aion if you value specific laptop protection and a unique waxed canvas aesthetic. Pick the Peak Design Travel Backpack if you want a lighter, more weather-resistant pack with versatile access points. Both are solid options, but they serve different packing styles.
Specs: Weight, Shell, and Access
Weight and Portability
Edge: Peak Design Travel Backpack 45L
The Thule Aion 40L Travel Backpack weighs 3.2 pounds, while the Peak Design Travel Backpack 45L is significantly lighter at 2.05 pounds. This difference matters when you are carrying your bag through terminals or up stairs. A lighter base weight allows you to pack more gear without exceeding airline limits. The Peak Design’s lighter construction gives you an advantage in everyday carry comfort. Thule’s heavier build may feel more substantial, but it adds to the total load you bear. If minimizing carried weight is your priority, the lighter option is the practical choice for long days on the move.
Shell Material and Durability
Edge: Tie
Thule uses bluesign approved, 100% recycled polyester fabrics with a waxed canvas and a PFC-free durable water-resistant coating. Peak Design employs a weatherproof 400D recycled nylon canvas shell with ultra-durable hardware. Thule’s waxed canvas is intended to have a broken-in appearance straight out of the box, which may appeal to those who prefer a vintage aesthetic. Peak Design’s nylon shell offers a sleek, minimalist silhouette with reinforced bottom liners for lasting durability. Both materials are recycled and designed to withstand travel rigors. Thule provides a specific water-resistant coating, while Peak Design highlights a weatherproof shell. Your choice depends on whether you prefer the look of waxed canvas or the technical feel of nylon.
Laptop Protection
Edge: Thule Aion 40L Travel Backpack
Thule explicitly states that its padded storage protects up to a 17-inch laptop. Peak Design lists a laptop sleeve in its features but does not specify the maximum screen size in the provided data. If you carry a large 17-inch device, Thule’s explicit specification offers clear assurance. For users with smaller laptops, both bags likely accommodate your device, but Thule’s stated capacity is more precise. You should verify if Peak Design’s sleeve fits your specific model if it exceeds standard 15-inch sizes. For now, Thule holds the edge for larger screens due to its published specifications.
Access and Carry Options
Edge: Peak Design Travel Backpack 45L
Peak Design offers top, side, and rear access points, allowing you to reach gear easily from multiple angles. It also features tuck-away shoulder straps and a hip belt for streamlined carry. Thule includes a dedicated water bottle pocket and a zippered top pocket for small items. It is compatible with the Thule Aion Sling Bag, which doubles as a supportive hip belt, though this is sold separately. Peak Design includes a luggage pass-through and 360-degree handles for easier movement through terminals. Thule’s hip belt is an add-on, whereas Peak Design integrates it. For versatile access and integrated carrying comfort, Peak Design provides more complete functionality out of the box.
Capacity and Expansion
Edge: Peak Design Travel Backpack 45L
Thule Aion 40L Travel Backpack has a fixed capacity of 40 liters, with a listed attribute range of 35-45L. Peak Design Travel Backpack 45L is explicitly expandable from 35L to 45L. Peak Design’s side pockets expand to hold bottles or tripods, adding functional versatility. Thule’s removable TPU rolltop bag allows you to store items without odor or moisture spreading, offering flexible internal organization. Both bags fall within the same capacity range for carry-on compliance. However, Peak Design’s expandable design is a built-in feature, while Thule’s flexibility comes from its rolltop and removable components. If you need predictable volume changes, Peak Design’s expansion mechanism is more direct.
Dimensions and Fit
Edge: Thule Aion 40L Travel Backpack
Thule measures 20.5 inches in height, 13 inches in width, and 9.06 inches in length. Peak Design measures 22 inches in height, 13 inches in width, and 9.49 inches in length. Both bags share the same width, but Peak Design is taller and slightly deeper. Thule is shorter and more compact in height. These differences affect how the bags fit in overhead bins or under seats. Peak Design’s height may exceed some strict carry-on limits, while Thule’s shorter profile might fit more easily in tighter spaces. You should check your airline’s specific dimension restrictions before choosing. The slightly different dimensions mean one may fit your specific travel needs better than the other.
Which Travel Backpack Fits Your Needs
Lightweight packers who value speed
Our pick: Peak Design Travel Backpack 45L
The Peak Design Travel Backpack 45L weighs just 2.05 pounds. This makes it significantly lighter than the Thule Aion 40L, which weighs 3.2 pounds. You will feel less strain when moving through terminals or climbing stairs. The lower weight helps you stay agile and comfortable during long travel days without carrying unnecessary bulk.
Travelers needing maximum expandable space
Our pick: Peak Design Travel Backpack 45L
The Peak Design Travel Backpack 45L offers a total capacity of 45 liters. It expands from 35L to 45L to accommodate more gear. The Thule Aion 40L has a fixed 40L size. If you need extra room for larger items or want the flexibility to adjust your load, the Peak Design provides more volume and adaptability.
Users wanting modular hip support
Our pick: Thule Aion 40L Travel Backpack
The Thule Aion 40L is compatible with the Thule Aion Sling Bag, which doubles as a supportive hip belt. You can purchase this accessory separately to enhance stability. The Peak Design includes a tuck-away hip belt but does not offer this specific modular add-on system. This option suits you if you prefer customizable load distribution.
Thule Aion 40L Travel Backpack
Best for: Organized carry with sustainable materials
- Capacity
- 40L
- Max Laptop Size
- 17"
- Primary Material
- Recycled polyester, waxed canvas
- Flight Compliance
- Carry-on compliant
- Dimensions
- 13 × 20.5 × 9.06 inches
- Weight
- 3.2 pounds
The Thule Aion 40L is a 3.2-pound travel backpack made from recycled polyester and waxed canvas. It offers 35-45L of capacity and fits a 17-inch laptop. The design includes a removable TPU rolltop and a hip belt compatible with the Thule Aion Sling Bag. You get dedicated pockets for water bottles and small items. This pack suits travelers who value organized storage and sustainable materials.
- 35-45L capacity with 40L main size
- Fits up to a 17-inch laptop
- Removable TPU rolltop bag for odor control
- Compatible with Thule Aion Sling Bag hip belt
- 40L capacity is smaller than the 45L competitor
- Requires separate purchase for the supportive hip belt
- Waxed canvas may show color variances straight out of the box
- You want a backpack with sustainable recycled materials
- You need a dedicated water bottle pocket
- You prefer organized internal zippered pockets
- You need a 45L capacity without buying a larger model
- You want a supportive hip belt included in the box
- You prefer a uniform color appearance without variances
Verdict: Thule Aion 40L Travel Backpack offers a compact 40L size with sustainable fabrics. It fits travelers who prioritize organization and eco-friendly materials over maximum capacity.
Peak Design Travel Backpack 45L
Best for: expandable carry-on travel
- Capacity
- 35-45L
- Primary Material
- 400D recycled nylon canvas
- Opening Style
- Rear and top access
- Flight Compliance
- Carry-on approved
- Features
- Expandable, Laptop Sleeve, Water Resistant
- Use
- Women, Men
The Peak Design Travel Backpack 45L is a carry-on approved pack with a 45L capacity that expands from 35L. It weighs 2.05 pounds and features a weatherproof 400D recycled nylon shell. You get rear and top access, plus side pockets for bottles or tripods. The tuck-away straps and hip belt allow for streamlined carry. This model suits travelers needing adaptable storage and durable, minimalist gear.
- Expandable capacity from 35L to 45L
- Weatherproof 400D recycled nylon canvas shell
- Rear and top access points
- Tuck-away shoulder straps and hip belt
- Carry-on approved dimensions
- Heavier at 2.05 pounds compared to lighter alternatives
- 45L maximum capacity is less than larger options
- Single color option in this variation
- You need expandable storage for 1-bag travel
- You want weatherproof protection for your gear
- You prefer rear and top access points
- You require a lighter bag under 2 pounds
- You need more than 45L of capacity
- You prefer a bag with multiple color options
Verdict: Peak Design Travel Backpack 45L is a durable, adaptable choice for travelers who prioritize weatherproof materials and flexible access. It fits those who need a carry-on pack with room to expand.
Specifications side by side
| Spec | Thule Aion 40L Travel Backpack | Peak Design Travel Backpack 45L |
|---|---|---|
| Capacity | 40L | 35-45L |
| Max Laptop Size | 17" | – |
| Primary Material | Recycled polyester, waxed canvas | 400D recycled nylon canvas |
| Opening Style | – | Rear and top access |
| Flight Compliance | Carry-on compliant | Carry-on approved |
| Features | – | Expandable, Laptop Sleeve, Water Resistant |
| Use | – | Women, Men |
| Dimensions | 13 × 20.5 × 9.06 inches | 9.49 × 13 × 22 inches |
| Weight | 3.2 pounds | 2.05 pounds |
| Size | 40L | 45L |
| Color | Nutria | Coyote |
| Model | 3204724 | BTR-45-CY-2 |
Frequently asked questions
Is the Thule Aion 40L a carry-on size?
Yes, the Thule Aion 40L Travel Backpack is designed as a carry-on. Its dimensions are 20.5 inches in width, 13 inches in length, and 9.06 inches in height. This compact profile fits most airline overhead bins, allowing you to avoid checked baggage fees and wait times at the carousel.
How much does the Peak Design Travel Backpack weigh?
The Peak Design Travel Backpack 45L weighs 2.05 pounds. This is notably lighter than the Thule Aion 40L, which weighs 3.2 pounds. The reduced weight helps minimize strain on your shoulders and back when you are navigating busy airports or climbing stairs during your travels.
What is the capacity of the Thule Aion 40L?
The Thule Aion 40L Travel Backpack offers a capacity between 35 and 45 liters. The specific model listed has a stated size of 40 liters. This volume provides enough room for a few days of clothing and essentials while keeping the pack compact and manageable for carry-on use.
Does the Peak Design bag expand for extra space?
Yes, the Peak Design Travel Backpack 45L is expandable. It features a capacity range of 35 to 45 liters, allowing you to adjust the volume based on your packing needs. This flexibility lets you compress the bag for lighter trips or expand it when you need more room for souvenirs or gear.
Is the Thule Aion 40L made from sustainable materials?
Yes, the Thule Aion 40L Travel Backpack is constructed using sustainable materials. It utilizes recycled polyester and waxed canvas for its shell. These fabrics are chosen to provide a durable, weather-resistant exterior with a broken-in look, appealing to travelers who prioritize eco-friendly manufacturing in their gear choices.
Which backpack is better for photographers?
The Peak Design Travel Backpack 45L is often preferred by photographers. It includes a dedicated laptop sleeve and features water-resistant materials to protect gear. Its expandable design and adaptable interior allow you to organize camera bodies, lenses, and accessories securely, making it a versatile choice for content creators on the move.
What color options are available for these backpacks?
The Thule Aion 40L Travel Backpack is available in Nutria. The Peak Design Travel Backpack 45L comes in Coyote. These color choices offer distinct aesthetic options, with Nutria providing an earthy tone and Coyote offering a classic tan shade that complements various travel styles and outdoor environments.
