Boundary Supply -- Prima System Modular Travel Backpack vs. Ortlieb Commuter Daypack City
Two carry-on travel backpacks, compared spec for spec.
Boundary Supply -- Prima System Modular Travel Backpack
| Capacity | 22 L |
| Weight | 1.4 kg |
| Dimensions | 49×28×13 cm |
| Airline fit | 92% |
| Price | $268 |
Feature by feature
| Boundary Supply -- Prima System Modular Travel Backpack | Feature | Ortlieb Commuter Daypack City |
|---|---|---|
| Storage | ||
| Y | Compression | N |
| 30L | Expanded Capacity | None |
| 0 | Opening | 0 |
| Y | Passport | N |
| Y | Passthrough | N |
| Carry | ||
| Y | Backpack | Y |
| removable | Hip Belt | removable |
| removable | Sternum Strap | removable |
| Inside | ||
| 17in | Laptop | 15in |
| 1 | Main Compartments | 1 |
| Y | Organizer | Y |
| Outside | ||
| × | Hard Shell | × |
| N | Rain-fly | N |
| 1 | Water Bottle Holder | N |
| Y | Water Resistant | Y |
| Material | |
| Nywool, Nylon, Kodra Nylon | PS33 |
Ortlieb Commuter Daypack City
| Capacity | 21 L |
| Weight | 0.75 kg |
| Dimensions | 50×30×15.5 cm |
| Airline fit | 92% |
| Price | $160 |
Key differences between the Boundary Supply -- Prima System Modular Travel Backpack and Ortlieb Commuter Daypack City
- Compression straps: Yes on the Boundary Supply -- Prima System Modular Travel Backpack; No on the Ortlieb Commuter Daypack City.
- Passport pocket: Yes on the Boundary Supply -- Prima System Modular Travel Backpack; No on the Ortlieb Commuter Daypack City.
- Luggage passthrough: Yes on the Boundary Supply -- Prima System Modular Travel Backpack; No on the Ortlieb Commuter Daypack City.
- Laptop sleeve: 17in on the Boundary Supply -- Prima System Modular Travel Backpack; 15in on the Ortlieb Commuter Daypack City.
- Water bottle pockets: 1 on the Boundary Supply -- Prima System Modular Travel Backpack; No on the Ortlieb Commuter Daypack City.
Both have: backpack straps, hip belt, sternum strap, built-in organizer, 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. 1 accept only the Boundary Supply -- Prima System Modular Travel Backpack, and 0 accept only the Ortlieb Commuter Daypack City.
Only the Boundary Supply -- Prima System Modular Travel Backpack fits
Great Lakes Airlines.
Boundary Supply -- Prima System Modular Travel Backpack vs. Ortlieb Commuter Daypack City: which should you pack?
The Boundary Supply -- Prima System Modular Travel Backpack carries 1L more than the Ortlieb Commuter Daypack City (22L vs. 21L), while the Ortlieb Commuter Daypack City is the lighter pack at 0.75kg (vs. 1.4kg). For carry-on flexibility, the Boundary Supply -- Prima System Modular Travel Backpack fits 92% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Boundary Supply -- Prima System Modular Travel Backpack; if you want to travel lighter, the Ortlieb Commuter Daypack City is the better call.