---
url: "https://onebag.travel/compare/69nfdrly0r/aer-fit-pack-3/o076evsb2l/pacsafe-metrosafe-x-anti-theft-20l-backpack/"
title: "Aer Fit Pack 3 vs Pacsafe Metrosafe X Anti-Theft 20L Backpack"
description: "Aer Fit Pack 3 vs Pacsafe Metrosafe X Anti-Theft 20L Backpack: capacity, weight, dimensions and how many airlines accept each as a carry-on, side by side."
source: "https://onebag.travel/compare/69nfdrly0r/aer-fit-pack-3/o076evsb2l/pacsafe-metrosafe-x-anti-theft-20l-backpack/"
---
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2.  [Carry-On Travel Backpacks](https://onebag.travel/carryons/)
3.  Aer Fit Pack 3 vs. Pacsafe Metrosafe X Anti-Theft 20L Backpack

# Aer Fit Pack 3 vs. Pacsafe Metrosafe X Anti-Theft 20L Backpack

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

## [Aer Fit Pack 3](https://onebag.travel/carryon/69nfdrly0r/aer-fit-pack-3/)

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

![Front facing view of the Aer Fit Pack 3](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1620127600/carryons/Aer_Fit_Pack_3_inpmfs.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>18.7 L</td></tr><tr><td>Weight</td><td>0 kg</td></tr><tr><td>Dimensions</td><td>44×32×20 cm</td></tr><tr><td>Airline fit</td><td>95%</td></tr><tr><td>Price</td><td>$145</td></tr></tbody></table>

## Feature by feature

| Aer Fit Pack 3 | Feature | Pacsafe Metrosafe X Anti-Theft 20L Backpack |
| --- | --- | --- |
| Storage |
| N | Compression | N |
| None | Expanded Capacity | None |
| 4 | Opening | 4 |
| Y | Passport | Y |
| Y | Passthrough | N |
| Carry |
| Y | Backpack | Y |
| N | Hip Belt | N |
| Y | Sternum Strap | N |
| Inside |
| 16in | Laptop | 15in |
| 1 | Main Compartments | 1 |
| N | Organizer | Y |
| Outside |
| × | Hard Shell | × |
| optional | 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>1680D Cordura® ballistic nylon exterior</td><td>750D Recycled polyester, 150D Recycled polyester</td></tr></tbody></table>

## [Pacsafe Metrosafe X Anti-Theft 20L Backpack](https://onebag.travel/carryon/o076evsb2l/pacsafe-metrosafe-x-anti-theft-20l-backpack/)

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

![Front facing view of the Pacsafe Metrosafe X Anti-Theft 20L Backpack](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1631699318/carryons/Pacsafe_Metrosafe_X_Anti-Theft_20L_Backpack_w0dafs.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>0.73 kg</td></tr><tr><td>Dimensions</td><td>45×30×13 cm</td></tr><tr><td>Airline fit</td><td>95%</td></tr><tr><td>Price</td><td>$140</td></tr></tbody></table>

## Key differences between the Aer Fit Pack 3 and Pacsafe Metrosafe X Anti-Theft 20L Backpack

-   **Luggage passthrough:** Yes on the Aer Fit Pack 3; No on the Pacsafe Metrosafe X Anti-Theft 20L Backpack.
-   **Sternum strap:** Yes on the Aer Fit Pack 3; No on the Pacsafe Metrosafe X Anti-Theft 20L Backpack.
-   **Laptop sleeve:** 16in on the Aer Fit Pack 3; 15in on the Pacsafe Metrosafe X Anti-Theft 20L Backpack.
-   **Built-in organizer:** No on the Aer Fit Pack 3; Yes on the Pacsafe Metrosafe X Anti-Theft 20L Backpack.
-   **Rain cover:** Optional on the Aer Fit Pack 3; No on the Pacsafe Metrosafe X Anti-Theft 20L Backpack.

Both have: passport pocket, backpack straps, 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. 179 accept both. 0 accept only the Aer Fit Pack 3, and 1 accept only the Pacsafe Metrosafe X Anti-Theft 20L Backpack.

### Only the Pacsafe Metrosafe X Anti-Theft 20L Backpack fits

Air Niugini.

## Aer Fit Pack 3 vs. Pacsafe Metrosafe X Anti-Theft 20L Backpack: which should you pack?

The **Pacsafe Metrosafe X Anti-Theft 20L Backpack** carries 1.3000000000000007L more than the **Aer Fit Pack 3** (18.7L vs. 20L), and the two are closely matched on weight. For carry-on flexibility, the **Aer Fit Pack 3** fits 95% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Pacsafe Metrosafe X Anti-Theft 20L Backpack; if you want to travel lighter, the Pacsafe Metrosafe X Anti-Theft 20L Backpack is the better call.