---
url: "https://onebag.travel/compare/lgggqva3tj/aer-duffel-pack-2/y1h7unap16/boundary-supply-rennen-x-pac-daypack/"
title: "Aer Duffel Pack 2 vs Boundary Supply Rennen X-Pac Daypack"
description: "Aer Duffel Pack 2 vs Boundary Supply Rennen X-Pac Daypack: capacity, weight, dimensions and how many airlines accept each as a carry-on, side by side."
source: "https://onebag.travel/compare/lgggqva3tj/aer-duffel-pack-2/y1h7unap16/boundary-supply-rennen-x-pac-daypack/"
---
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2.  [Carry-On Travel Backpacks](https://onebag.travel/carryons/)
3.  Aer Duffel Pack 2 vs. Boundary Supply Rennen X-Pac Daypack

# Aer Duffel Pack 2 vs. Boundary Supply Rennen X-Pac Daypack

Two carry-on travel backpacks, compared spec for spec.

## [Aer Duffel Pack 2](https://onebag.travel/carryon/lgggqva3tj/aer-duffel-pack-2/)

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

![Front facing view of the Aer Duffel Pack 2](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1618225092/carryons/Aer_Duffel_Pack_2_wphfg9.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>24.6 L</td></tr><tr><td>Weight</td><td>1.1 kg</td></tr><tr><td>Dimensions</td><td>55×30×20 cm</td></tr><tr><td>Airline fit</td><td>86%</td></tr><tr><td>Price</td><td>$136</td></tr></tbody></table>

## Feature by feature

| Aer Duffel Pack 2 | Feature | Boundary Supply Rennen X-Pac Daypack |
| --- | --- | --- |
| Storage |
| N | Compression | N |
| None | Expanded Capacity | None |
| 0 | Opening | 4 |
| N | Passport | N |
| N | Passthrough | N |
| Carry |
| Y | Backpack | Y |
| N | Hip Belt | N |
| Y | Sternum Strap | N |
| Inside |
| 15in | Laptop | 15in |
| 3 | Main Compartments | 1 |
| N | Organizer | N |
| 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>900D eco-dyed polyester exterior</td><td>Custom VX21 X-Pac material</td></tr></tbody></table>

## [Boundary Supply Rennen X-Pac Daypack](https://onebag.travel/carryon/y1h7unap16/boundary-supply-rennen-x-pac-daypack/)

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

![Front facing view of the Boundary Supply Rennen X-Pac Daypack](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1620707394/carryons/Boundary_Supply_Rennen_tsojqe.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>0.9 kg</td></tr><tr><td>Dimensions</td><td>46×28×18 cm</td></tr><tr><td>Airline fit</td><td>95%</td></tr><tr><td>Price</td><td>$170</td></tr></tbody></table>

## Key differences between the Aer Duffel Pack 2 and Boundary Supply Rennen X-Pac Daypack

-   **Opening:** Other on the Aer Duffel Pack 2; Top zip on the Boundary Supply Rennen X-Pac Daypack.
-   **Sternum strap:** Yes on the Aer Duffel Pack 2; No on the Boundary Supply Rennen X-Pac Daypack.
-   **Main compartments:** 3 on the Aer Duffel Pack 2; 1 on the Boundary Supply Rennen X-Pac Daypack.

Both have: backpack straps, 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. 163 accept both. 0 accept only the Aer Duffel Pack 2, and 16 accept only the Boundary Supply Rennen X-Pac Daypack.

### Only the Boundary Supply Rennen X-Pac Daypack fits

Air Niugini, American Eagle, Belavia, easyJet, Etihad Airways, Great Lakes Airlines, Liat Airlines, Oman Air, Qatar Airways, Ravn Alaska, Regional Express, Royal Jordanian, Scoot, Tiger Airways, Virgin Australia, WestJet.

## Aer Duffel Pack 2 vs. Boundary Supply Rennen X-Pac Daypack: which should you pack?

The **Aer Duffel Pack 2** carries 2.6000000000000014L more than the **Boundary Supply Rennen X-Pac Daypack** (24.6L vs. 22L), while the **Boundary Supply Rennen X-Pac Daypack** is the lighter pack at 0.9kg (vs. 1.1kg). For carry-on flexibility, the **Boundary Supply Rennen X-Pac Daypack** fits 95% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Aer Duffel Pack 2; if you want to travel lighter, the Boundary Supply Rennen X-Pac Daypack is the better call.