---
url: "https://onebag.travel/compare/2rbg4dtslw/aer-travel-pack-4-35l/e0ld4qyd0b/aer-travel-pack-3-x-pac/"
title: "Aer Travel Pack 4 35L vs Aer Travel Pack 3 X-Pac"
description: "Aer Travel Pack 4 35L vs Aer Travel Pack 3 X-Pac: capacity, weight, dimensions and how many airlines accept each as a carry-on, side by side."
source: "https://onebag.travel/compare/2rbg4dtslw/aer-travel-pack-4-35l/e0ld4qyd0b/aer-travel-pack-3-x-pac/"
---
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2.  [Carry-On Travel Backpacks](https://onebag.travel/carryons/)
3.  Aer Travel Pack 4 35L vs. Aer Travel Pack 3 X-Pac

# Aer Travel Pack 4 35L vs. Aer Travel Pack 3 X-Pac

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

## [Aer Travel Pack 4 35L](https://onebag.travel/carryon/2rbg4dtslw/aer-travel-pack-4-35l/)

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

![Front facing view of the Aer Travel Pack 4 35L](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1788990469/carryons/aer-travel-pack-4-35l-2rbg4dtslw.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>35 L</td></tr><tr><td>Weight</td><td>1.8 kg</td></tr><tr><td>Dimensions</td><td>55×34×23 cm</td></tr><tr><td>Airline fit</td><td>68%</td></tr><tr><td>Price</td><td>$260</td></tr></tbody></table>

## Feature by feature

| Aer Travel Pack 4 35L | Feature | Aer Travel Pack 3 X-Pac |
| --- | --- | --- |
| Storage |
| N | Compression | 4 |
| None | Expanded Capacity | None |
| 1 | Opening | 1 |
| top | Passport | top, side |
| Y | Passthrough | Y |
| Carry |
| Y | Backpack | Y |
| optional | Hip Belt | optional |
| removable | Sternum Strap | removable |
| Inside |
| 16in | Laptop | 16in |
| 5 | Main Compartments | 4 |
| 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>1680D CORDURA® ballistic nylon exterior (bluesign® approved)</td><td>VX-42 X-Pac (also in 1680D Cordura ballistic nylon)</td></tr></tbody></table>

## [Aer Travel Pack 3 X-Pac](https://onebag.travel/carryon/e0ld4qyd0b/aer-travel-pack-3-x-pac/)

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

![Front facing view of the Aer Travel Pack 3 X-Pac](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1788990468/carryons/aer-travel-pack-3-x-pac-e0ld4qyd0b.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>35 L</td></tr><tr><td>Weight</td><td>1.8 kg</td></tr><tr><td>Dimensions</td><td>55×33×22 cm</td></tr><tr><td>Airline fit</td><td>69%</td></tr><tr><td>Price</td><td>$280</td></tr></tbody></table>

## Key differences between the Aer Travel Pack 4 35L and Aer Travel Pack 3 X-Pac

-   **Compression straps:** No on the Aer Travel Pack 4 35L; 4 on the Aer Travel Pack 3 X-Pac.
-   **Passport pocket:** Top on the Aer Travel Pack 4 35L; Top, side on the Aer Travel Pack 3 X-Pac.
-   **Main compartments:** 5 on the Aer Travel Pack 4 35L; 4 on the Aer Travel Pack 3 X-Pac.
-   **Water bottle pockets:** 2, side on the Aer Travel Pack 4 35L; 1, side on the Aer Travel Pack 3 X-Pac.

Both have: luggage passthrough, backpack straps, hip belt, sternum strap, 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. 129 accept both. 0 accept only the Aer Travel Pack 4 35L, and 1 accept only the Aer Travel Pack 3 X-Pac.

### Only the Aer Travel Pack 3 X-Pac fits

Pakistan International.

## Aer Travel Pack 4 35L vs. Aer Travel Pack 3 X-Pac: which should you pack?

The **Aer Travel Pack 4 35L** carries the same capacity as the **Aer Travel Pack 3 X-Pac** (35L vs. 35L), while the **Aer Travel Pack 4 35L** is the lighter pack at 1.8kg (vs. 1.8kg). For carry-on flexibility, the **Aer Travel Pack 3 X-Pac** fits 69% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Aer Travel Pack 4 35L; if you want to travel lighter, the Aer Travel Pack 4 35L is the better call.