Boundary Supply Errant Daypack vs. Aer City Pack Pro
Two carry-on travel backpacks, compared spec for spec.
Boundary Supply Errant Daypack
| Capacity | 22 L |
| Weight | 1.4 kg |
| Dimensions | 48×26×14 cm |
| Airline fit | 93% |
| Price | $269 |
Feature by feature
| Boundary Supply Errant Daypack | Feature | Aer City Pack Pro |
|---|---|---|
| Storage | ||
| 1 | Compression | N |
| None | Expanded Capacity | None |
| 1 | Opening | 1 |
| back | Passport | top, side |
| Y | Passthrough | Y |
| Carry | ||
| Y | Backpack | Y |
| removable | Hip Belt | N |
| removable | Sternum Strap | removable |
| Inside | ||
| 15in | Laptop | 16in |
| 5 | Main Compartments | 5 |
| N | Organizer | Y |
| Outside | ||
| × | Hard Shell | × |
| N | Rain-fly | N |
| 1, side | Water Bottle Holder | 1, side |
| Y | Water Resistant | Y |
| Material | |
| 500D Duramax Kodra | 1680D Cordura® ballistic nylon exterior, or xPac |
Key differences between the Boundary Supply Errant Daypack and Aer City Pack Pro
- Compression straps: 1 on the Boundary Supply Errant Daypack; No on the Aer City Pack Pro.
- Passport pocket: Back on the Boundary Supply Errant Daypack; Top, side on the Aer City Pack Pro.
- Hip belt: Removable on the Boundary Supply Errant Daypack; No on the Aer City Pack Pro.
- Laptop sleeve: 15in on the Boundary Supply Errant Daypack; 16in on the Aer City Pack Pro.
- Built-in organizer: No on the Boundary Supply Errant Daypack; Yes on the Aer City Pack Pro.
Both have: luggage passthrough, backpack straps, sternum strap, 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. 174 accept both. 2 accept only the Boundary Supply Errant Daypack, and 3 accept only the Aer City Pack Pro.
Only the Boundary Supply Errant Daypack fits
Air Niugini, Great Lakes Airlines.
Only the Aer City Pack Pro fits
American Eagle, easyJet, Ravn Alaska.
Boundary Supply Errant Daypack vs. Aer City Pack Pro: which should you pack?
The Aer City Pack Pro carries 2L more than the Boundary Supply Errant Daypack (22L vs. 24L), while the Aer City Pack Pro is the lighter pack at 1.2kg (vs. 1.4kg). For carry-on flexibility, the Aer City Pack Pro fits 94% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Aer City Pack Pro; if you want to travel lighter, the Aer City Pack Pro is the better call.