Aer Pro Slim Pack vs. Day Owl Backpack Pro
Two carry-on travel backpacks, compared spec for spec.
Feature by feature
| Aer Pro Slim Pack | Feature | Day Owl Backpack Pro |
|---|---|---|
| Storage | ||
| N | Compression | N |
| None | Expanded Capacity | None |
| 1 | Opening | 1 |
| front | Passport | top, back |
| Y | Passthrough | Y |
| Carry | ||
| Y | Backpack | Y |
| N | Hip Belt | N |
| Y | Sternum Strap | N |
| Inside | ||
| 16in | Laptop | 16in |
| 3 | 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 | |
| 840D CORDURA re/cor recycled nylon | 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 Pro Slim Pack and Day Owl Backpack Pro
- Passport pocket: Front on the Aer Pro Slim Pack; Top, back on the Day Owl Backpack Pro.
- Sternum strap: Yes on the Aer Pro Slim Pack; No on the Day Owl Backpack Pro.
- Main compartments: 3 on the Aer Pro Slim Pack; 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. 179 accept both. Every airline that takes one takes the other.
Aer Pro Slim Pack vs. Day Owl Backpack Pro: which should you pack?
The Day Owl Backpack Pro carries 8L more than the Aer Pro Slim Pack (13L vs. 21L), while the Aer Pro Slim Pack is the lighter pack at 0.9kg (vs. 1.1kg). For carry-on flexibility, the Aer Pro Slim Pack fits 95% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Day Owl Backpack Pro; if you want to travel lighter, the Aer Pro Slim Pack is the better call.