Alpha One-Niner Evade 1.5 Backpack vs. Boundary Supply Errant Daypack
Two carry-on travel backpacks, compared spec for spec.
Alpha One-Niner Evade 1.5 Backpack
| Capacity | 22 L |
| Weight | 1.5 kg |
| Dimensions | 47×31×14 cm |
| Airline fit | 92% |
| Price | $225 |
Feature by feature
| Alpha One-Niner Evade 1.5 Backpack | Feature | Boundary Supply Errant Daypack |
|---|---|---|
| Storage | ||
| 2 | Compression | 1 |
| None | Expanded Capacity | None |
| 1 | Opening | 1 |
| back | Passport | back |
| N | Passthrough | Y |
| Carry | ||
| Y | Backpack | Y |
| removable | Hip Belt | removable |
| removable | Sternum Strap | removable |
| Inside | ||
| 16in | Laptop | 15in |
| 5 | Main Compartments | 5 |
| Y | Organizer | N |
| Outside | ||
| × | Hard Shell | × |
| N | Rain-fly | N |
| 2, side | Water Bottle Holder | 1, side |
| Y | Water Resistant | Y |
| Material | |
| Dimension-Polyant’s X42, Cordura 500D Nylon, 630D HD Twill | 500D Duramax Kodra |
Boundary Supply Errant Daypack
| Capacity | 22 L |
| Weight | 1.4 kg |
| Dimensions | 48×26×14 cm |
| Airline fit | 93% |
| Price | $269 |
Key differences between the Alpha One-Niner Evade 1.5 Backpack and Boundary Supply Errant Daypack
- Compression straps: 2 on the Alpha One-Niner Evade 1.5 Backpack; 1 on the Boundary Supply Errant Daypack.
- Luggage passthrough: No on the Alpha One-Niner Evade 1.5 Backpack; Yes on the Boundary Supply Errant Daypack.
- Laptop sleeve: 16in on the Alpha One-Niner Evade 1.5 Backpack; 15in on the Boundary Supply Errant Daypack.
- Built-in organizer: Yes on the Alpha One-Niner Evade 1.5 Backpack; No on the Boundary Supply Errant Daypack.
- Water bottle pockets: 2, side on the Alpha One-Niner Evade 1.5 Backpack; 1, side on the Boundary Supply Errant Daypack.
Both have: passport pocket, backpack straps, hip belt, sternum strap, 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. 0 accept only the Alpha One-Niner Evade 1.5 Backpack, and 2 accept only the Boundary Supply Errant Daypack.
Only the Boundary Supply Errant Daypack fits
Air Niugini, Great Lakes Airlines.
Alpha One-Niner Evade 1.5 Backpack vs. Boundary Supply Errant Daypack: which should you pack?
The Alpha One-Niner Evade 1.5 Backpack carries the same capacity as the Boundary Supply Errant Daypack (22L vs. 22L), while the Boundary Supply Errant Daypack is the lighter pack at 1.4kg (vs. 1.5kg). For carry-on flexibility, the Boundary Supply Errant Daypack fits 93% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Alpha One-Niner Evade 1.5 Backpack; if you want to travel lighter, the Boundary Supply Errant Daypack is the better call.