Why compare these options?
Compare adjacent published size/fit options in the same manufacturer family; source-backed differences: weightG 226.8 g, capacityL 12.0 L. Actual usable space and wearing comfort remain untested.
- How do the listed capacity and empty-weight differences affect your intended load?
- Which published exterior measurements suit your storage constraint, before checking actual fit and closure?
Thule Thule Aion travel backpack 28L
Thule Thule Aion travel backpack 40LManufacturer model photographs; pictured colour and size are not independently confirmed. No hands-on winner or rating is assigned.
| Field | Thule Aion travel backpack 28L | Thule Aion travel backpack 40L |
|---|---|---|
| Published empty weight | 1224.7 g | 1451.5 g |
| Outside dimensions | 27.9 × 23.1 × 47 cm · length / width / height | 33 × 23.1 × 52.1 cm · length / width / height |
| Published capacity | 28 L | 40 L |
| Shoulder strap | Unknown | Unknown |
| Pockets / storage | Zipped pocket described; Bottle storage described; Water bottle pocket described; Top pocket described; Phone storage described; Zippered pocket described | Zipped pocket described; Bottle storage described; Water bottle pocket described; Top pocket described; Phone storage described; Zippered pocket described |
| Recorded price | USD 199.95 · US online store | USD 209.95 · US online store |
| Specification option | Black | Dark slate |
What changes between the published specifications
The published empty-weight values differ by 226.8 g. This compares manufacturer figures; accessory inclusion and weighing tolerance may differ.
Listed capacity: 28 L versus 40 L. Volume ratings do not establish a pocket opening or the shape of an object that can fit.
Outside dimensions stay in the order used by each manufacturer. Match labelled axes where supplied; unlabelled axes do not support a height-to-height claim.
With an illustrative 1 kg load, starting totals would be 2,224.7 g and 2,451.5 g before any accessories excluded from the published weights. This is arithmetic, not a comfort or packed-load test.
Questions these numbers cannot settle
- Will your phone and passport fit together with the bag fully closed?
- Can you reach the needed pocket while wearing the bag?
- Does the strap adjust comfortably over your clothing and body measurements?
- How does the particular material perform in your use?
Use the two fact sheets for model details, then check those questions with the actual bag or directly with its manufacturer.
Open the comparison toolOfficial sources
- Thule Aion travel backpack 28L ↗Checked 2026-10-15
- Thule Aion travel backpack 40L ↗Checked 2026-10-15