---
url: "https://onebag.travel/compare/ttfp84t9n3/moment-everything-backpack-21l-overnight/ut39o0uw8z/aer-day-pack-3/"
title: "Moment Everything Backpack 21L Overnight vs Aer Day Pack 3"
description: "Moment Everything Backpack 21L Overnight 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/ttfp84t9n3/moment-everything-backpack-21l-overnight/ut39o0uw8z/aer-day-pack-3/"
---
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2.  [Carry-On Travel Backpacks](https://onebag.travel/carryons/)
3.  Moment Everything Backpack 21L Overnight vs. Aer Day Pack 3

# Moment Everything Backpack 21L Overnight vs. Aer Day Pack 3

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

## [Moment Everything Backpack 21L Overnight](https://onebag.travel/carryon/ttfp84t9n3/moment-everything-backpack-21l-overnight/)

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

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>21 L</td></tr><tr><td>Weight</td><td>0.8 kg</td></tr><tr><td>Dimensions</td><td>47×29×15 cm</td></tr><tr><td>Airline fit</td><td>93%</td></tr><tr><td>Price</td><td>$150</td></tr></tbody></table>

## Feature by feature

| Moment Everything Backpack 21L Overnight | Feature | Aer Day Pack 3 |
| --- | --- | --- |
| Storage |
| N | Compression | N |
| None | Expanded Capacity | None |
| 0 | 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 |
| N | 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>420D Nylon Fabric</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 Moment Everything Backpack 21L Overnight and Aer Day Pack 3

-   **Opening:** Other on the Moment Everything Backpack 21L Overnight; Clamshell on the Aer Day Pack 3.
-   **Passport pocket:** Front on the Moment Everything Backpack 21L Overnight; Top 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. 175 accept both. 0 accept only the Moment Everything Backpack 21L Overnight, and 5 accept only the Aer Day Pack 3.

### Only the Aer Day Pack 3 fits

Air Tahiti, American Eagle, easyJet, Gulf Air, Ravn Alaska.

## Moment Everything Backpack 21L Overnight vs. Aer Day Pack 3: which should you pack?

The **Moment Everything Backpack 21L Overnight** carries 7L more than the **Aer Day Pack 3** (21L vs. 14L), while the **Moment Everything Backpack 21L Overnight** is the lighter pack at 0.8kg (vs. 1.3kg). For carry-on flexibility, the **Aer Day Pack 3** fits 95% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Moment Everything Backpack 21L Overnight; if you want to travel lighter, the Moment Everything Backpack 21L Overnight is the better call.