---
url: "https://onebag.travel/compare/rzsc61ufe5/aer-pro-slim-pack/ut39o0uw8z/aer-day-pack-3/"
title: "Aer Pro Slim Pack vs Aer Day Pack 3 - One Bag Travel"
description: "Aer Pro Slim Pack vs Aer Day Pack 3: capacity, weight, dimensions and how many airlines accept each as a carry-on, side by side."
source: "https://onebag.travel/compare/rzsc61ufe5/aer-pro-slim-pack/ut39o0uw8z/aer-day-pack-3/"
---
1.  [Home](https://onebag.travel/)
2.  [Carry-On Travel Backpacks](https://onebag.travel/carryons/)
3.  Aer Pro Slim Pack vs. Aer Day Pack 3

# Aer Pro Slim Pack vs. Aer Day Pack 3

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

## [Aer Pro Slim Pack](https://onebag.travel/carryon/rzsc61ufe5/aer-pro-slim-pack/)

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

![Front facing view of the Aer Pro Slim Pack](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1788990323/carryons/aer-pro-slim-pack-rzsc61ufe5.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>13 L</td></tr><tr><td>Weight</td><td>0.9 kg</td></tr><tr><td>Dimensions</td><td>43×31×10 cm</td></tr><tr><td>Airline fit</td><td>95%</td></tr><tr><td>Price</td><td>$140</td></tr></tbody></table>

## Feature by feature

| Aer Pro Slim Pack | Feature | Aer Day Pack 3 |
| --- | --- | --- |
| Storage |
| N | Compression | N |
| None | Expanded Capacity | None |
| 1 | Opening | 1 |
| front | Passport | top |
| Y | Passthrough | Y |
| Carry |
| Y | Backpack | Y |
| N | Hip Belt | N |
| Y | Sternum Strap | Y |
| Inside |
| 16in | Laptop | 16in |
| 3 | Main Compartments | 3 |
| Y | Organizer | N |
| Outside |
| × | Hard Shell | × |
| N | Rain-fly | N |
| 1, 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>1680D Cordura® ballistic nylon exterior (bluesign® approved)</td></tr></tbody></table>

## [Aer Day Pack 3](https://onebag.travel/carryon/ut39o0uw8z/aer-day-pack-3/)

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

![Front facing view of the Aer Day Pack 3](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1788990291/carryons/aer-day-pack-3-ut39o0uw8z.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>14 L</td></tr><tr><td>Weight</td><td>1.3 kg</td></tr><tr><td>Dimensions</td><td>44×30×14 cm</td></tr><tr><td>Airline fit</td><td>95%</td></tr><tr><td>Price</td><td>$160</td></tr></tbody></table>

## Key differences between the Aer Pro Slim Pack and Aer Day Pack 3

-   **Passport pocket:** Front on the Aer Pro Slim Pack; Top on the Aer Day Pack 3.
-   **Built-in organizer:** Yes on the Aer Pro Slim Pack; No on the Aer Day Pack 3.

Both have: luggage passthrough, backpack straps, sternum strap, 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. 179 accept both. 0 accept only the Aer Pro Slim Pack, and 1 accept only the Aer Day Pack 3.

### Only the Aer Day Pack 3 fits

Air Niugini.

## Aer Pro Slim Pack vs. Aer Day Pack 3: which should you pack?

The **Aer Day Pack 3** carries 1L more than the **Aer Pro Slim Pack** (13L vs. 14L), while the **Aer Pro Slim Pack** is the lighter pack at 0.9kg (vs. 1.3kg). For carry-on flexibility, the **Aer Pro Slim Pack** fits 95% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Aer Day Pack 3; if you want to travel lighter, the Aer Pro Slim Pack is the better call.