---
url: "https://onebag.travel/compare/c0au43xw52/boundary-supply-prima-system-modular-travel-backpack/ipl8ugouy3/ortlieb-commuter-daypack-city/"
title: "Boundary Supply -- Prima System Modular Travel Backpack vs Ortlieb Commuter Daypack City"
description: "Boundary Supply -- Prima System Modular Travel Backpack vs Ortlieb Commuter Daypack City: capacity, weight, dimensions and how many airlines accept each as a…"
source: "https://onebag.travel/compare/c0au43xw52/boundary-supply-prima-system-modular-travel-backpack/ipl8ugouy3/ortlieb-commuter-daypack-city/"
---
1.  [Home](https://onebag.travel/)
2.  [Carry-On Travel Backpacks](https://onebag.travel/carryons/)
3.  Boundary Supply -- Prima System Modular Travel Backpack vs. Ortlieb Commuter Daypack City

# 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](https://onebag.travel/carryon/c0au43xw52/boundary-supply-prima-system-modular-travel-backpack/)

by [Boundary Supply](https://onebag.travel/carryons/?brands=Boundary Supply)

![Front facing view of the Boundary Supply -- Prima System Modular Travel Backpack](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1619698435/carryons/Boundary_Supply_Prima_System_jsyefe.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>22 L</td></tr><tr><td>Weight</td><td>1.4 kg</td></tr><tr><td>Dimensions</td><td>49×28×13 cm</td></tr><tr><td>Airline fit</td><td>92%</td></tr><tr><td>Price</td><td>$268</td></tr></tbody></table>

## 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 |

<table class="cmp-material"><tbody><tr><td colspan="2">Material</td></tr><tr><td>Nywool, Nylon, Kodra Nylon</td><td>PS33</td></tr></tbody></table>

## [Ortlieb Commuter Daypack City](https://onebag.travel/carryon/ipl8ugouy3/ortlieb-commuter-daypack-city/)

by [Ortlieb](https://onebag.travel/carryons/?brands=Ortlieb)

![Front facing view of the Ortlieb Commuter Daypack City](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1631152726/carryons/Ortlieb_Commuter_Daypack_City_zvgoud.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>21 L</td></tr><tr><td>Weight</td><td>0.75 kg</td></tr><tr><td>Dimensions</td><td>50×30×15.5 cm</td></tr><tr><td>Airline fit</td><td>92%</td></tr><tr><td>Price</td><td>$160</td></tr></tbody></table>

## 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.