---
url: "https://onebag.travel/compare/eo06ykjj5l/cotopaxi-allpa-26/y3b7zyyz0h/stm-good-myth-backpack-28l/"
title: "Cotopaxi Allpa 26 vs STM Good Myth Backpack 28L"
description: "Cotopaxi Allpa 26 vs STM Good Myth Backpack 28L: capacity, weight, dimensions and how many airlines accept each as a carry-on, side by side."
source: "https://onebag.travel/compare/eo06ykjj5l/cotopaxi-allpa-26/y3b7zyyz0h/stm-good-myth-backpack-28l/"
---
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3.  Cotopaxi Allpa 26 vs. STM Good Myth Backpack 28L

# Cotopaxi Allpa 26 vs. STM Good Myth Backpack 28L

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

## [Cotopaxi Allpa 26](https://onebag.travel/carryon/eo06ykjj5l/cotopaxi-allpa-26/)

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

![Front facing view of the Cotopaxi Allpa 26](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1788990348/carryons/cotopaxi-allpa-26-eo06ykjj5l.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>26 L</td></tr><tr><td>Weight</td><td>0.9 kg</td></tr><tr><td>Dimensions</td><td>52×33×23 cm</td></tr><tr><td>Airline fit</td><td>70%</td></tr><tr><td>Price</td><td>$145</td></tr></tbody></table>

## Feature by feature

| Cotopaxi Allpa 26 | Feature | STM Good Myth Backpack 28L |
| --- | --- | --- |
| Storage |
| N | Compression | N |
| None | Expanded Capacity | None |
| 0 | Opening | 0 |
| front | Passport | N |
| Y | Passthrough | Y |
| Carry |
| Y | Backpack | Y |
| N | Hip Belt | N |
| Y | Sternum Strap | Y |
| Inside |
| 16in | Laptop | 16in |
| 4 | Main Compartments | 4 |
| Y | Organizer | N |
| Outside |
| × | Hard Shell | × |
| N | Rain-fly | N |
| 2, side | Water Bottle Holder | 2 |
| N | Water Resistant | Y |

<table class="cmp-material"><tbody><tr><td colspan="2">Material</td></tr><tr><td>100% recycled polyester 450D TPU</td><td>100% polyester</td></tr></tbody></table>

## [STM Good Myth Backpack 28L](https://onebag.travel/carryon/y3b7zyyz0h/stm-good-myth-backpack-28l/)

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

![Front facing view of the STM Good Myth Backpack 28L](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1617337526/carryons/STM_Myth_Backpack_crkuwf.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>28 L</td></tr><tr><td>Weight</td><td>1.2 kg</td></tr><tr><td>Dimensions</td><td>46×31×18 cm</td></tr><tr><td>Airline fit</td><td>94%</td></tr><tr><td>Price</td><td>$140</td></tr></tbody></table>

## Key differences between the Cotopaxi Allpa 26 and STM Good Myth Backpack 28L

-   **Passport pocket:** Front on the Cotopaxi Allpa 26; No on the STM Good Myth Backpack 28L.
-   **Built-in organizer:** Yes on the Cotopaxi Allpa 26; No on the STM Good Myth Backpack 28L.
-   **Water bottle pockets:** 2, side on the Cotopaxi Allpa 26; 2 on the STM Good Myth Backpack 28L.
-   **Water resistant:** No on the Cotopaxi Allpa 26; Yes on the STM Good Myth Backpack 28L.

Both have: luggage passthrough, backpack straps, sternum strap, laptop sleeve.

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

We checked both bags against the carry-on size limits of 189 airlines. 132 accept both. 0 accept only the Cotopaxi Allpa 26, and 45 accept only the STM Good Myth Backpack 28L.

### Only the STM Good Myth Backpack 28L fits

Air Baltic, Air China, Air Malta, Air Serbia, Air Seychelles, American Eagle, Asiana Airlines, ATA Airlines, Belavia, Blue Air, Bulgaria Air, China Eastern, easyJet, Emirates Airlines, Enter Air, Etihad Airways, flybe, Icelandair, InselAir, Juneyao Airlines, Liat Airlines, Luxair, Meridiana Fly, Nordwind Airlines, Oman Air, Pakistan International, Qatar Airways, Ravn Alaska, Regional Express, Royal Brunei Airlines, Royal Jordanian, Ryanair, S7, Shandong Airlines, Shenzhen Airlines, Sun Express, TAP Air Portugal, TAROM, Tianjin Airlines (A320 & E190), TUI, Ukraine International, VIM Airlines (Closed), Virgin Australia, Volotea, Xiamen.

## Cotopaxi Allpa 26 vs. STM Good Myth Backpack 28L: which should you pack?

The **STM Good Myth Backpack 28L** carries 2L more than the **Cotopaxi Allpa 26** (26L vs. 28L), while the **Cotopaxi Allpa 26** is the lighter pack at 0.9kg (vs. 1.2kg). For carry-on flexibility, the **STM Good Myth Backpack 28L** fits 94% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the STM Good Myth Backpack 28L; if you want to travel lighter, the Cotopaxi Allpa 26 is the better call.