---
url: "https://onebag.travel/compare/c0au43xw52/boundary-supply-prima-system-modular-travel-backpack/ekfhca6uop/briggs-riley-medium-cargo-backpack/"
title: "Boundary Supply -- Prima System Modular Travel Backpack vs Briggs & Riley Medium Cargo Backpack"
description: "Boundary Supply -- Prima System Modular Travel Backpack vs Briggs & Riley Medium Cargo Backpack: capacity, weight, dimensions and how many airlines accept…"
source: "https://onebag.travel/compare/c0au43xw52/boundary-supply-prima-system-modular-travel-backpack/ekfhca6uop/briggs-riley-medium-cargo-backpack/"
---
1.  [Home](https://onebag.travel/)
2.  [Carry-On Travel Backpacks](https://onebag.travel/carryons/)
3.  Boundary Supply -- Prima System Modular Travel Backpack vs. Briggs & Riley Medium Cargo Backpack

# Boundary Supply -- Prima System Modular Travel Backpack vs. Briggs & Riley Medium Cargo Backpack

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 | Briggs & Riley Medium Cargo Backpack |
| --- | --- | --- |
| Storage |
| Y | Compression | N |
| 30L | Expanded Capacity | None |
| 0 | Opening | 4 |
| Y | Passport | Y |
| Y | Passthrough | Y |
| Carry |
| Y | Backpack | Y |
| removable | Hip Belt | N |
| removable | Sternum Strap | N |
| Inside |
| 17in | Laptop | 15in |
| 1 | Main Compartments | 1 |
| Y | Organizer | Y |
| Outside |
| × | Hard Shell | × |
| N | Rain-fly | N |
| 1 | Water Bottle Holder | 1 |
| Y | Water Resistant | Y |

<table class="cmp-material"><tbody><tr><td colspan="2">Material</td></tr><tr><td>Nywool, Nylon, Kodra Nylon</td><td>1600D ballistic nylon outer fabric</td></tr></tbody></table>

## [Briggs & Riley Medium Cargo Backpack](https://onebag.travel/carryon/ekfhca6uop/briggs-riley-medium-cargo-backpack/)

by [Briggs & Riley](https://onebag.travel/carryons/?brands=Briggs & Riley)

![Front facing view of the Briggs & Riley Medium Cargo Backpack](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1620713927/carryons/B_R_Medium_Cargo_Backpack_tf0hhg.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>27.3 L</td></tr><tr><td>Weight</td><td>1.2 kg</td></tr><tr><td>Dimensions</td><td>45.5×34.5×20.5 cm</td></tr><tr><td>Airline fit</td><td>74%</td></tr><tr><td>Price</td><td>$329</td></tr></tbody></table>

## Key differences between the Boundary Supply -- Prima System Modular Travel Backpack and Briggs & Riley Medium Cargo Backpack

-   **Compression straps:** Yes on the Boundary Supply -- Prima System Modular Travel Backpack; No on the Briggs & Riley Medium Cargo Backpack.
-   **Opening:** Other on the Boundary Supply -- Prima System Modular Travel Backpack; Top zip on the Briggs & Riley Medium Cargo Backpack.
-   **Hip belt:** Removable on the Boundary Supply -- Prima System Modular Travel Backpack; No on the Briggs & Riley Medium Cargo Backpack.
-   **Sternum strap:** Removable on the Boundary Supply -- Prima System Modular Travel Backpack; No on the Briggs & Riley Medium Cargo Backpack.
-   **Laptop sleeve:** 17in on the Boundary Supply -- Prima System Modular Travel Backpack; 15in on the Briggs & Riley Medium Cargo Backpack.

Both have: passport pocket, luggage passthrough, backpack straps, built-in organizer, 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. 137 accept both. 37 accept only the Boundary Supply -- Prima System Modular Travel Backpack, and 2 accept only the Briggs & Riley Medium Cargo Backpack.

### Only the Boundary Supply -- Prima System Modular Travel Backpack fits

Air Baltic, Air China, Air Malta, Air Niugini, Air Serbia, Air Seychelles, Asiana Airlines, ATA Airlines, Belavia, Blue Air, Bulgaria Air, Cayman Airways, China Eastern, Emirates Airlines, Enter Air, flybe, Great Lakes Airlines, Icelandair, InselAir, Juneyao Airlines, Luxair, Meridiana Fly, Nordwind Airlines, Royal Brunei Airlines, Ryanair, S7, Shandong Airlines, Shenzhen Airlines, Sun Express, TAP Air Portugal, TAROM, Tianjin Airlines (A320 & E190), TUI, Ukraine International, VIM Airlines (Closed), Volotea, Xiamen.

### Only the Briggs & Riley Medium Cargo Backpack fits

American Eagle, Ravn Alaska.

## Boundary Supply -- Prima System Modular Travel Backpack vs. Briggs & Riley Medium Cargo Backpack: which should you pack?

The **Briggs & Riley Medium Cargo Backpack** carries 5.300000000000001L more than the **Boundary Supply -- Prima System Modular Travel Backpack** (22L vs. 27.3L), while the **Briggs & Riley Medium Cargo Backpack** is the lighter pack at 1.2kg (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 Briggs & Riley Medium Cargo Backpack; if you want to travel lighter, the Briggs & Riley Medium Cargo Backpack is the better call.