---
url: "https://onebag.travel/compare/aldchn064h/patagonia-ascensionist-pack-55l/c2p5wz36ut/atom-pack-the-mo/"
title: "Patagonia Ascensionist Pack 55L vs Atom Pack "The Mo""
description: "Patagonia Ascensionist Pack 55L vs Atom Pack "The Mo": capacity, weight, dimensions and how many airlines accept each as a carry-on, side by side."
source: "https://onebag.travel/compare/aldchn064h/patagonia-ascensionist-pack-55l/c2p5wz36ut/atom-pack-the-mo/"
---
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3.  Patagonia Ascensionist Pack 55L vs. Atom Pack "The Mo"

# Patagonia Ascensionist Pack 55L vs. Atom Pack "The Mo"

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

## [Patagonia Ascensionist Pack 55L](https://onebag.travel/carryon/aldchn064h/patagonia-ascensionist-pack-55l/)

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

![Front facing view of the Patagonia Ascensionist Pack 55L](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1633507455/carryons/Ascensionist_Pack_55_fk9adg.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>55 L</td></tr><tr><td>Weight</td><td>1.28 kg</td></tr><tr><td>Dimensions</td><td>67×32×20 cm</td></tr><tr><td>Airline fit</td><td>1%</td></tr><tr><td>Price</td><td>$219</td></tr></tbody></table>

## Feature by feature

| Patagonia Ascensionist Pack 55L | Feature | Atom Pack "The Mo" |
| --- | --- | --- |
| Storage |
| removable | Compression | Y |
| None | Expanded Capacity | None |
| 0 | Opening | 2 |
| N | Passport | N |
| N | Passthrough | N |
| Carry |
| Y | Backpack | Y |
| removable | Hip Belt | removable |
| removable | Sternum Strap | removable |
| Inside |
| N | Laptop | N |
| 1 | Main Compartments | 1 |
| N | Organizer | N |
| Outside |
| × | Hard Shell | × |
| N | Rain-fly | N |
| N | Water Bottle Holder | 2 |
| Y | Water Resistant | Y |

<table class="cmp-material"><tbody><tr><td colspan="2">Material</td></tr><tr><td>420-denier 100% recycled nylon ripstop, 0-denier 100% nylon ripstop</td><td>VX21 X-Pac fabric</td></tr></tbody></table>

## [Atom Pack "The Mo"](https://onebag.travel/carryon/c2p5wz36ut/atom-pack-the-mo/)

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

![Front facing view of the Atom Pack "The Mo"](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1620624608/carryons/Atom_Pack_The_Mo_ierjqf.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>40 L</td></tr><tr><td>Weight</td><td>0 kg</td></tr><tr><td>Dimensions</td><td>91×84×74 cm</td></tr><tr><td>Airline fit</td><td>0%</td></tr><tr><td>Price</td><td>$245</td></tr></tbody></table>

## Key differences between the Patagonia Ascensionist Pack 55L and Atom Pack "The Mo"

-   **Compression straps:** Removable on the Patagonia Ascensionist Pack 55L; Yes on the Atom Pack "The Mo".
-   **Opening:** Other on the Patagonia Ascensionist Pack 55L; Rolltop on the Atom Pack "The Mo".
-   **Water bottle pockets:** No on the Patagonia Ascensionist Pack 55L; 2 on the Atom Pack "The Mo".

Both have: backpack straps, hip belt, sternum strap, water resistant.

## Which airlines take each bag as a carry-on

We checked both bags against the carry-on size limits of 189 airlines. 0 accept both. 2 accept only the Patagonia Ascensionist Pack 55L, and 0 accept only the Atom Pack "The Mo".

### Only the Patagonia Ascensionist Pack 55L fits

Azul Airlines, Virgin America.

## Patagonia Ascensionist Pack 55L vs. Atom Pack "The Mo": which should you pack?

The **Patagonia Ascensionist Pack 55L** carries 15L more than the **Atom Pack "The Mo"** (55L vs. 40L), and the two are closely matched on weight. For carry-on flexibility, the **Patagonia Ascensionist Pack 55L** fits 1% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Patagonia Ascensionist Pack 55L; if you want to travel lighter, the Patagonia Ascensionist Pack 55L is the better call.