---
url: "https://onebag.travel/compare/0g6d1jm2t9/cotopaxi-allpa-50l-adventure-travel/ysi35vk7j5/rei-co-op-ruckpack-40/"
title: "Cotopaxi Allpa 50L Adventure Travel vs REI Co-op Ruckpack 40"
description: "Cotopaxi Allpa 50L Adventure Travel vs REI Co-op Ruckpack 40: capacity, weight, dimensions and how many airlines accept each as a carry-on, side by side."
source: "https://onebag.travel/compare/0g6d1jm2t9/cotopaxi-allpa-50l-adventure-travel/ysi35vk7j5/rei-co-op-ruckpack-40/"
---
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3.  Cotopaxi Allpa 50L Adventure Travel vs. REI Co-op Ruckpack 40

# Cotopaxi Allpa 50L Adventure Travel vs. REI Co-op Ruckpack 40

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

## [Cotopaxi Allpa 50L Adventure Travel](https://onebag.travel/carryon/0g6d1jm2t9/cotopaxi-allpa-50l-adventure-travel/)

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

![Front facing view of the Cotopaxi Allpa 50L Adventure Travel](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1788990476/carryons/cotopaxi-allpa-50l-adventure-travel-0g6d1jm2t9.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>50 L</td></tr><tr><td>Weight</td><td>2 kg</td></tr><tr><td>Dimensions</td><td>69×36×26 cm</td></tr><tr><td>Airline fit</td><td>1%</td></tr><tr><td>Price</td><td>$300</td></tr></tbody></table>

## Feature by feature

| Cotopaxi Allpa 50L Adventure Travel | Feature | REI Co-op Ruckpack 40 |
| --- | --- | --- |
| Storage |
| N | Compression | 2 |
| None | Expanded Capacity | None |
| 1 | Opening | 1 |
| back | Passport | top, side |
| N | Passthrough | N |
| Carry |
| hideable | Backpack | hideable |
| hideable | Hip Belt | hideable |
| Y | Sternum Strap | Y |
| Inside |
| 16in | Laptop | 15in |
| 5 | Main Compartments | 5 |
| N | Organizer | N |
| Outside |
| × | Hard Shell | × |
| N | Rain-fly | Y |
| 1, side | Water Bottle Holder | 2, side |
| Y | Water Resistant | Y |

<table class="cmp-material"><tbody><tr><td colspan="2">Material</td></tr><tr><td>100% recycled 840D TPU-coated nylon</td><td>recycled nylon shell</td></tr></tbody></table>

## [REI Co-op Ruckpack 40](https://onebag.travel/carryon/ysi35vk7j5/rei-co-op-ruckpack-40/)

by [REI Co-op](https://onebag.travel/carryons/?brands=REI Co-op)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>40 L</td></tr><tr><td>Weight</td><td>1.3 kg</td></tr><tr><td>Dimensions</td><td>58×38×24 cm</td></tr><tr><td>Airline fit</td><td>4%</td></tr><tr><td>Price</td><td>$159</td></tr></tbody></table>

## Key differences between the Cotopaxi Allpa 50L Adventure Travel and REI Co-op Ruckpack 40

-   **Compression straps:** No on the Cotopaxi Allpa 50L Adventure Travel; 2 on the REI Co-op Ruckpack 40.
-   **Passport pocket:** Back on the Cotopaxi Allpa 50L Adventure Travel; Top, side on the REI Co-op Ruckpack 40.
-   **Laptop sleeve:** 16in on the Cotopaxi Allpa 50L Adventure Travel; 15in on the REI Co-op Ruckpack 40.
-   **Rain cover:** No on the Cotopaxi Allpa 50L Adventure Travel; Yes on the REI Co-op Ruckpack 40.
-   **Water bottle pockets:** 1, side on the Cotopaxi Allpa 50L Adventure Travel; 2, side on the REI Co-op Ruckpack 40.

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. 1 accept both. 0 accept only the Cotopaxi Allpa 50L Adventure Travel, and 6 accept only the REI Co-op Ruckpack 40.

### Only the REI Co-op Ruckpack 40 fits

Frontier Airlines, Island Air, PenAir, Southwest Airlines, Sun Country, Virgin America.

## Cotopaxi Allpa 50L Adventure Travel vs. REI Co-op Ruckpack 40: which should you pack?

The **Cotopaxi Allpa 50L Adventure Travel** carries 10L more than the **REI Co-op Ruckpack 40** (50L vs. 40L), while the **REI Co-op Ruckpack 40** is the lighter pack at 1.3kg (vs. 2kg). For carry-on flexibility, the **REI Co-op Ruckpack 40** fits 4% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Cotopaxi Allpa 50L Adventure Travel; if you want to travel lighter, the REI Co-op Ruckpack 40 is the better call.