# Travel Backpack 45L vs Travel Pack 3: specs and price compared

A sourced, side-by-side comparison of the Travel Backpack 45L (Peak Design) and Travel Pack 3 (Aer) among travel backpacks. Travel Pack 3 is the cheaper of the two at $249.

## Side by side

| Spec | Travel Backpack 45L | Travel Pack 3 |
| --- | --- | --- |
| US price | $299.95 | $249 |
| Brand | Peak Design | Aer |
| Released | 2018 | — |
| Capacity liters | 45 | 35 |
| Weight (lb) | 4.55 | 4.12 |
| Laptop size (in) | 16 | 16 |
| Carry on compliant | Yes | Yes |
| Material | 400D recycled nylon canvas, 900D nylon bottom, DWR-coated polyurethane liner | 1680D Cordura ballistic nylon (bluesign approved), YKK zippers, Duraflex hardware |
| Warranty years | 99 | 99 |
| Dimensions (in) | 22 x 13 x 9.5 in | 21.5 x 13 x 9 in |

## Key differences

- Capacity liters: Travel Backpack 45L 45 vs Travel Pack 3 35
- Weight (lb): Travel Backpack 45L 4.55 vs Travel Pack 3 4.12
- Material: Travel Backpack 45L 400D recycled nylon canvas, 900D nylon bottom, DWR-coated polyurethane liner vs Travel Pack 3 1680D Cordura ballistic nylon (bluesign approved), YKK zippers, Duraflex hardware
- Dimensions (in): Travel Backpack 45L 22 x 13 x 9.5 in vs Travel Pack 3 21.5 x 13 x 9 in

## Sources

- Travel Backpack 45L: https://www.peakdesign.com/products/travel-backpack (peakdesign.com, verified 2026-06-15)
- Travel Pack 3: https://aersf.com/products/travel-pack-3 (aersf.com, verified 2026-06-15)

Canonical: https://frontdeskreview.com/gear/travel-backpacks/peak-design-travel-backpack-45l-vs-aer-travel-pack-3/
Cite: Per The Front Desk Review, Travel Backpack 45L ($299.95) vs Travel Pack 3 ($249) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/travel-backpacks/peak-design-travel-backpack-45l-vs-aer-travel-pack-3/
License: CC BY 4.0.