Aer Duffel Pack 3 X-Pac vs. Day Owl Backpack Pro
Two carry-on travel backpacks, compared spec for spec.
Aer Duffel Pack 3 X-Pac
| Capacity | 21 L |
| Weight | 1.3 kg |
| Dimensions | 52×30×20 cm |
| Airline fit | 88% |
| Price | $210 |
Feature by feature
| Aer Duffel Pack 3 X-Pac | Feature | Day Owl Backpack Pro |
|---|---|---|
| Storage | ||
| N | Compression | N |
| None | Expanded Capacity | None |
| 0 | Opening | 1 |
| top, side | Passport | top, back |
| Y | Passthrough | Y |
| Carry | ||
| Y | Backpack | Y |
| N | Hip Belt | N |
| removable | Sternum Strap | N |
| Inside | ||
| 16in | Laptop | 16in |
| 5 | Main Compartments | 6 |
| Y | Organizer | Y |
| Outside | ||
| × | Hard Shell | × |
| N | Rain-fly | N |
| 1, side | Water Bottle Holder | 1, side |
| Y | Water Resistant | Y |
| Material | |
| VX-42 X-Pac (also in 1680D Cordura) | waxed canvas |
Day Owl Backpack Pro
| Capacity | 21 L |
| Weight | 1.1 kg |
| Dimensions | 43×31×13 cm |
| Airline fit | 95% |
| Price | $155 |
Key differences between the Aer Duffel Pack 3 X-Pac and Day Owl Backpack Pro
- Opening: Other on the Aer Duffel Pack 3 X-Pac; Clamshell on the Day Owl Backpack Pro.
- Passport pocket: Top, side on the Aer Duffel Pack 3 X-Pac; Top, back on the Day Owl Backpack Pro.
- Sternum strap: Removable on the Aer Duffel Pack 3 X-Pac; No on the Day Owl Backpack Pro.
- Main compartments: 5 on the Aer Duffel Pack 3 X-Pac; 6 on the Day Owl Backpack Pro.
Both have: luggage passthrough, backpack straps, laptop sleeve, built-in organizer, water bottle pockets, water resistant.
Which airlines take each bag as a carry-on
We checked both bags against the carry-on size limits of 189 airlines. 167 accept both. 0 accept only the Aer Duffel Pack 3 X-Pac, and 12 accept only the Day Owl Backpack Pro.
Only the Day Owl Backpack Pro fits
Air Tahiti, American Eagle, Belavia, easyJet, Etihad Airways, Gulf Air, Oman Air, Qatar Airways, Ravn Alaska, Regional Express, Royal Jordanian, Virgin Australia.
Aer Duffel Pack 3 X-Pac vs. Day Owl Backpack Pro: which should you pack?
The Aer Duffel Pack 3 X-Pac carries the same capacity as the Day Owl Backpack Pro (21L vs. 21L), while the Day Owl Backpack Pro is the lighter pack at 1.1kg (vs. 1.3kg). For carry-on flexibility, the Day Owl Backpack Pro fits 95% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Aer Duffel Pack 3 X-Pac; if you want to travel lighter, the Day Owl Backpack Pro is the better call.