---
url: "https://onebag.travel/compare/pwip3uvh89/aer-pro-pack-20l/ygoqcabjlu/day-owl-backpack-pro/"
title: "Aer Pro Pack 20L vs Day Owl Backpack Pro - One Bag Travel"
description: "Aer Pro Pack 20L vs Day Owl Backpack Pro: capacity, weight, dimensions and how many airlines accept each as a carry-on, side by side."
source: "https://onebag.travel/compare/pwip3uvh89/aer-pro-pack-20l/ygoqcabjlu/day-owl-backpack-pro/"
---
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2.  [Carry-On Travel Backpacks](https://onebag.travel/carryons/)
3.  Aer Pro Pack 20L vs. Day Owl Backpack Pro

# Aer Pro Pack 20L vs. Day Owl Backpack Pro

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

## [Aer Pro Pack 20L](https://onebag.travel/carryon/pwip3uvh89/aer-pro-pack-20l/)

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

![Front facing view of the Aer Pro Pack 20L](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1788990321/carryons/aer-pro-pack-20l-pwip3uvh89.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>20 L</td></tr><tr><td>Weight</td><td>1.1 kg</td></tr><tr><td>Dimensions</td><td>45×31×14 cm</td></tr><tr><td>Airline fit</td><td>95%</td></tr><tr><td>Price</td><td>$180</td></tr></tbody></table>

## Feature by feature

| Aer Pro Pack 20L | Feature | Day Owl Backpack Pro |
| --- | --- | --- |
| Storage |
| N | Compression | N |
| None | Expanded Capacity | None |
| 1 | Opening | 1 |
| top | Passport | top, back |
| Y | Passthrough | Y |
| Carry |
| Y | Backpack | Y |
| N | Hip Belt | N |
| Y | Sternum Strap | N |
| Inside |
| 16in | Laptop | 16in |
| 4 | Main Compartments | 6 |
| Y | Organizer | Y |
| Outside |
| × | Hard Shell | × |
| N | Rain-fly | N |
| 2, side | Water Bottle Holder | 1, side |
| Y | Water Resistant | Y |

<table class="cmp-material"><tbody><tr><td colspan="2">Material</td></tr><tr><td>840D CORDURA re/cor recycled nylon</td><td>waxed canvas</td></tr></tbody></table>

## [Day Owl Backpack Pro](https://onebag.travel/carryon/ygoqcabjlu/day-owl-backpack-pro/)

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

![Front facing view of the Day Owl Backpack Pro](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1788990353/carryons/day-owl-backpack-pro-ygoqcabjlu.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>1.1 kg</td></tr><tr><td>Dimensions</td><td>43×31×13 cm</td></tr><tr><td>Airline fit</td><td>95%</td></tr><tr><td>Price</td><td>$155</td></tr></tbody></table>

## Key differences between the Aer Pro Pack 20L and Day Owl Backpack Pro

-   **Passport pocket:** Top on the Aer Pro Pack 20L; Top, back on the Day Owl Backpack Pro.
-   **Sternum strap:** Yes on the Aer Pro Pack 20L; No on the Day Owl Backpack Pro.
-   **Main compartments:** 4 on the Aer Pro Pack 20L; 6 on the Day Owl Backpack Pro.
-   **Water bottle pockets:** 2, side on the Aer Pro Pack 20L; 1, side on the Day Owl Backpack Pro.

Both have: luggage passthrough, backpack straps, laptop sleeve, 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. 179 accept both. Every airline that takes one takes the other.

## Aer Pro Pack 20L vs. Day Owl Backpack Pro: which should you pack?

The **Day Owl Backpack Pro** carries 1L more than the **Aer Pro Pack 20L** (20L vs. 21L), while the **Aer Pro Pack 20L** is the lighter pack at 1.1kg (vs. 1.1kg). For carry-on flexibility, the **Aer Pro Pack 20L** fits 95% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Day Owl Backpack Pro; if you want to travel lighter, the Aer Pro Pack 20L is the better call.