---
url: "https://onebag.travel/compare/4ur3vo1zzw/rei-co-op-ruckpack-18/f7vvgl9fzq/patagonia-atom-tote-pack-20l/"
title: "REI Co-op Ruckpack 18 vs Patagonia Atom Tote Pack 20L"
description: "REI Co-op Ruckpack 18 vs Patagonia Atom Tote Pack 20L: capacity, weight, dimensions and how many airlines accept each as a carry-on, side by side."
source: "https://onebag.travel/compare/4ur3vo1zzw/rei-co-op-ruckpack-18/f7vvgl9fzq/patagonia-atom-tote-pack-20l/"
---
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2.  [Carry-On Travel Backpacks](https://onebag.travel/carryons/)
3.  REI Co-op Ruckpack 18 vs. Patagonia Atom Tote Pack 20L

# REI Co-op Ruckpack 18 vs. Patagonia Atom Tote Pack 20L

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

## [REI Co-op Ruckpack 18](https://onebag.travel/carryon/4ur3vo1zzw/rei-co-op-ruckpack-18/)

![Front facing view of the REI Co-op Ruckpack 18](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1601601381/carryons/reirutpack_nq5156.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>18 L</td></tr><tr><td>Weight</td><td>0.7 kg</td></tr><tr><td>Dimensions</td><td>44×26×18 cm</td></tr><tr><td>Airline fit</td><td>96%</td></tr><tr><td>Price</td><td>$65</td></tr></tbody></table>

## Feature by feature

| REI Co-op Ruckpack 18 | Feature | Patagonia Atom Tote Pack 20L |
| --- | --- | --- |
| Storage |
|  | Compression | N |
| None | Expanded Capacity | None |
| 0 | Opening | 0 |
| side | Passport | front |
| N | Passthrough | N |
| Carry |
|  | Backpack | Y |
| removable | Hip Belt | N |
| removable | Sternum Strap | removable |
| Inside |
| 15in | Laptop | 13in |
| 2 | Main Compartments | 2 |
| Y | Organizer | Y |
| Outside |
| × | Hard Shell | × |
| N | Rain-fly | N |
|  | Water Bottle Holder | 2, side |
| Y | Water Resistant | Y |

<table class="cmp-material"><tbody><tr><td colspan="2">Material</td></tr><tr><td>210-denier nylon ripstop</td><td>7.3-oz 400-denier recycled Polyester with DWR Finish</td></tr></tbody></table>

## [Patagonia Atom Tote Pack 20L](https://onebag.travel/carryon/f7vvgl9fzq/patagonia-atom-tote-pack-20l/)

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

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>20 L</td></tr><tr><td>Weight</td><td>0.6 kg</td></tr><tr><td>Dimensions</td><td>41×30×13 cm</td></tr><tr><td>Airline fit</td><td>95%</td></tr><tr><td>Price</td><td>$90</td></tr></tbody></table>

## Key differences between the REI Co-op Ruckpack 18 and Patagonia Atom Tote Pack 20L

-   **Passport pocket:** Side on the REI Co-op Ruckpack 18; Front on the Patagonia Atom Tote Pack 20L.
-   **Hip belt:** Removable on the REI Co-op Ruckpack 18; No on the Patagonia Atom Tote Pack 20L.
-   **Laptop sleeve:** 15in on the REI Co-op Ruckpack 18; 13in on the Patagonia Atom Tote Pack 20L.

Both have: sternum strap, 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. 180 accept both. 1 accept only the REI Co-op Ruckpack 18, and 0 accept only the Patagonia Atom Tote Pack 20L.

### Only the REI Co-op Ruckpack 18 fits

Great Lakes Airlines.

## REI Co-op Ruckpack 18 vs. Patagonia Atom Tote Pack 20L: which should you pack?

The **Patagonia Atom Tote Pack 20L** carries 2L more than the **REI Co-op Ruckpack 18** (18L vs. 20L), while the **Patagonia Atom Tote Pack 20L** is the lighter pack at 0.6kg (vs. 0.7kg). For carry-on flexibility, the **REI Co-op Ruckpack 18** fits 96% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Patagonia Atom Tote Pack 20L; if you want to travel lighter, the Patagonia Atom Tote Pack 20L is the better call.