Thule Aion Backpack: Features, Specifications, travel Guide

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What Is the Thule Aion Backpack?

The Thule Aion is a multifunctional backpack designed to transition seamlessly between everyday activities and travel. As a result, its practical features make it suitable for commuters, weekend travelers, business travelers, and people who prefer traveling with a backpack instead of traditional luggage. In particular, the 28L model is designed as a versatile daypack that can expand to 32L when additional space is needed for trips. On the other hand, the 40L model provides considerably more packing space and is designed primarily for carry-on travel.

Key Features of the Thule Aion Backpack

1. Expandable 28L Capacity

Thule Aion 28L can expand to 32L, providing approximately 15% more packing space when required. This makes it practical for everyday use while still giving travelers additional room for a weekend trip.

2. Suitcase-Style Opening

The 28L backpack opens fully through its back panel, offering a convenient suitcase-style packing experience. As a result, travelers can organize clothing, electronics, and other essentials more efficiently, making packing and unpacking easier than with a conventional top-loading backpack.

3. TPU Divider for Better Organization

The 28L model includes a stowable TPU-lined divider that helps separate everyday belongings from active or potentially dirty gear. Additionally, its design helps limit the spread of moisture, dirt, and odors to other items inside the backpack. The divider can also be tucked away when it is not required. Meanwhile, the 40L model features a removable TPU-lined rolltop bag, providing a practical way to keep sports equipment, damp items, or dirty clothing separate from the main contents

4. Laptop Protection

Both versions provide padded storage for laptops up to 17 inches, making the Aion suitable for travelers who need to work while away from home.

5. Water-Resistant Waxed Canvas

The backpack is made from waxed P600 polyester canvas, which provides a durable construction for everyday travel and commuting. In addition, Thule uses a water-resistant finish designed to help repel moisture, dirt, and stains, and the coating is made without toxic PFCs. However, the backpack is water-resistant rather than fully waterproof. Therefore, travelers carrying electronics should consider using additional protection during heavy rain or prolonged exposure to water.

6. Recycled Materials

Thule states that the shell fabric, lining, and mesh are made from 100% recycled materials, including recycled polyester made from plastic bottles. The Aion collection is also bluesign® certified.

7. Water Bottle and Quick-Access Storage

The Aion includes a dedicated water bottle pocket, a zippered top pocket, an external quick-access stash pocket, and an internal zippered pocket for smaller items such as a phone or charger.

8. Luggage Pass-Through

The 28L model has a pass-through panel that allows it to be secured to rolling luggage. This is useful when moving through airports or train stations with a suitcase.

9. External Attachment Points

An external daisy chain provides additional attachment points for small equipment or accessories. The backpack is also compatible with the separately sold Thule Aion Sling, which can function as a supportive hip belt.

Thule Aion 28L vs. 40L

The two versions are aimed at different types of travelers.

Specification	Thule Aion 28L	Thule Aion 40L
Capacity	28L	40L
Expanded capacity	32L	—
Dimensions	11 × 9.1 × 18.5 in	13 × 9.1 × 20.5 in
Weight	2.71 lb	3.19 lb
Laptop capacity	Up to 17″	Up to 17″
Material	Waxed P600 polyester canvas	Waxed P600 polyester canvas
TPU storage	Stowable divider	Removable rolltop bag
Water bottle pocket	Yes	Yes
Luggage pass-through	Yes	—
Internal compression straps	—	Yes
Carry-on design	Compact travel option	Designed to meet most airline carry-on requirements

Specifications are from Thule’s current product information.

Thule Aion 28L: Who Should Choose It?

The 28L model is the better choice for travelers who want one backpack for both everyday life and shorter trips.

It is particularly suitable for:

• Weekend getaways
• City breaks
• Daily commuting
• Business travel
• Lightweight travelers
• Travelers carrying a laptop
• People who want expandable storage

Its ability to expand from 28L to 32L gives it more flexibility than a fixed-capacity everyday backpack.

Thule Aion 40L: Who Should Choose It?

The 40L model is designed for travelers who need more packing space and want to travel with a larger backpack.

It can be a good option for:

• Longer weekend trips
• Carry-on travel
• Business trips
• Minimalist travelers who want to avoid checked luggage
• Travelers carrying additional clothing or equipment

The removable TPU rolltop compartment is especially useful for separating dirty clothes or sports equipment from the main contents. Thule also states that the 40L model is designed to comply with most airline carry-on requirements. Airline size and weight rules vary, however, so travelers should always check their airline’s current baggage requirements before departure.

Thule Aion for Business and Work Travel

The Thule Aion can also serve as a practical business travel backpack. Its padded laptop compartment, organized storage, quick-access pockets, and suitcase-style opening make it convenient for carrying a laptop, chargers, documents, clothing, and other essentials. Furthermore, the 28L model is especially suitable for professionals who need a versatile backpack that can easily transition from the office or daily commute to a short business trip.

Thule Aion for Weekend Travel

For a short two- or three-day trip, the 28L version offers a useful balance between size and storage. It can accommodate clothing and personal essentials while providing dedicated areas for a laptop and smaller accessories. Travelers who need more clothing, shoes, or equipment may prefer the 40L model because of its larger capacity.

Thule Aion Backpack Specifications

Thule Aion 28L

• Capacity: 28L
• Expanded capacity: 32L
• Dimensions: 11 × 9.1 × 18.5 inches
• Weight: 2.71 lb
• Laptop protection: Up to 17 inches
• Laptop compartment: 15.75 × 10.25 × 0.75 inches
• Material: Waxed P600 polyester canvas
• Water bottle pocket: Yes
• Luggage pass-through: Yes
• TPU divider: Yes
• External daisy chain: Yes
• Internal zippered pocket: Yes

Thule Aion 40L

• Capacity: 40L
• Dimensions: 13 × 9.1 × 20.5 inches
• Weight: 3.19 lb
• Laptop protection: Up to 17 inches
• Material: Waxed P600 polyester canvas
• Water bottle pocket: Yes
• TPU-lined removable rolltop: Yes
• Internal compression straps: Yes
• Internal zippered pocket: Yes
• Lockable exterior zipper sliders: Yes; locks sold separately
• Carry-on design: Designed to comply with most airline carry-on requirements

Pros and Considerations

Advantages

• Flexible capacity on the 28L model
• Large 40L option for extended travel
• Laptop protection up to 17 inches
• Suitcase-style opening on the 28L
• Dedicated water bottle storage
• Useful internal and external organization
• Durable waxed canvas construction
• Water-resistant finish
• Recycled materials
• bluesign® certification

Things to Consider

The 40L version is larger and heavier than the 28L, so it may be unnecessary for travelers who pack lightly. The water-resistant exterior can help protect belongings from everyday moisture, but it should not be treated as waterproof. Also, although Thule describes the 40L as compatible with most airline carry-on requirements, airline restrictions differ. Always check the requirements of your specific airline before traveling.

Is the Thule Aion Backpack Worth Considering?

The Thule Aion is a practical choice for travelers looking for a versatile backpack that works for both everyday use and travel. Rather than focusing exclusively on commuting or trips, it combines convenient daily organization with features designed for travel. Overall, the 28L model is the more versatile option for commuting, short trips, and weekend travel, especially because it can expand to 32L when additional space is needed. In contrast, the 40L model is better suited to travelers who prioritize greater packing capacity and carry-on functionality. Additionally, its durable materials, padded laptop protection, organized storage, water-resistant finish, and travel-focused features make the Thule Aion a well-rounded option for modern travelers.