Boundary Supply Errant Daypack vs. haize project Clamshell 25
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 | haize project Clamshell 25 |
|---|---|---|
| Storage | ||
| 1 | Compression | 4 |
| None | Expanded Capacity | None |
| 1 | Opening | 1 |
| back | Passport | top |
| Y | Passthrough | N |
| Carry | ||
| Y | Backpack | Y |
| removable | Hip Belt | N |
| removable | Sternum Strap | removable |
| Inside | ||
| 15in | Laptop | 15in |
| 5 | Main Compartments | 4 |
| N | Organizer | N |
| Outside | ||
| × | Hard Shell | × |
| N | Rain-fly | N |
| 1, side | Water Bottle Holder | 1, side |
| Y | Water Resistant | Y |
| Material | |
| 500D Duramax Kodra | 1680D RPET polyurethane |
haize project Clamshell 25
| Capacity | 25 L |
| Weight | 1.4 kg |
| Dimensions | 50×29×17 cm |
| Airline fit | 92% |
| Price | $333 |
Key differences between the Boundary Supply Errant Daypack and haize project Clamshell 25
- Compression straps: 1 on the Boundary Supply Errant Daypack; 4 on the haize project Clamshell 25.
- Passport pocket: Back on the Boundary Supply Errant Daypack; Top on the haize project Clamshell 25.
- Luggage passthrough: Yes on the Boundary Supply Errant Daypack; No on the haize project Clamshell 25.
- Hip belt: Removable on the Boundary Supply Errant Daypack; No on the haize project Clamshell 25.
- Main compartments: 5 on the Boundary Supply Errant Daypack; 4 on the haize project Clamshell 25.
Both have: backpack straps, sternum strap, laptop sleeve, 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. 173 accept both. 3 accept only the Boundary Supply Errant Daypack, and 0 accept only the haize project Clamshell 25.
Only the Boundary Supply Errant Daypack fits
Great Lakes Airlines, Regional Express, Virgin Australia.
Boundary Supply Errant Daypack vs. haize project Clamshell 25: which should you pack?
The haize project Clamshell 25 carries 3L more than the Boundary Supply Errant Daypack (22L vs. 25L), while the Boundary Supply Errant Daypack is the lighter pack at 1.4kg (vs. 1.4kg). 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 haize project Clamshell 25; if you want to travel lighter, the Boundary Supply Errant Daypack is the better call.