---
url: "https://onebag.travel/compare/bxh0dwkmur/mec-outpost-40l-travel-pack/t0jtlftd9v/haize-project-clamshell-25/"
title: "MEC Outpost 40L Travel Pack vs haize project Clamshell 25"
description: "MEC Outpost 40L Travel Pack vs haize project Clamshell 25: capacity, weight, dimensions and how many airlines accept each as a carry-on, side by side."
source: "https://onebag.travel/compare/bxh0dwkmur/mec-outpost-40l-travel-pack/t0jtlftd9v/haize-project-clamshell-25/"
---
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3.  MEC Outpost 40L Travel Pack vs. haize project Clamshell 25

# MEC Outpost 40L Travel Pack vs. haize project Clamshell 25

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

## [MEC Outpost 40L Travel Pack](https://onebag.travel/carryon/bxh0dwkmur/mec-outpost-40l-travel-pack/)

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

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>40 L</td></tr><tr><td>Weight</td><td>1.4 kg</td></tr><tr><td>Dimensions</td><td>50×35×23 cm</td></tr><tr><td>Airline fit</td><td>71%</td></tr><tr><td>Price</td><td>$200</td></tr></tbody></table>

## Feature by feature

| MEC Outpost 40L Travel Pack | Feature | haize project Clamshell 25 |
| --- | --- | --- |
| Storage |
| 4 | Compression | 4 |
| None | Expanded Capacity | None |
| 1 | Opening | 1 |
| top | Passport | top |
| Y | Passthrough | N |
| Carry |
| hideable | Backpack | Y |
| removable | Hip Belt | N |
| removable | Sternum Strap | removable |
| Inside |
| 15in | Laptop | 15in |
| 4 | Main Compartments | 4 |
| N | Organizer | N |
| Outside |
| × | Hard Shell | × |
| N | Rain-fly | N |
| 1, side | Water Bottle Holder | 1, side |
| N | Water Resistant | Y |

<table class="cmp-material"><tbody><tr><td colspan="2">Material</td></tr><tr><td>PU coated 300-denier ripstop</td><td>1680D RPET polyurethane</td></tr></tbody></table>

## [haize project Clamshell 25](https://onebag.travel/carryon/t0jtlftd9v/haize-project-clamshell-25/)

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

![Front facing view of the haize project Clamshell 25](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1788990372/carryons/haize-project-clamshell-25-t0jtlftd9v.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>25 L</td></tr><tr><td>Weight</td><td>1.4 kg</td></tr><tr><td>Dimensions</td><td>50×29×17 cm</td></tr><tr><td>Airline fit</td><td>92%</td></tr><tr><td>Price</td><td>$333</td></tr></tbody></table>

## Key differences between the MEC Outpost 40L Travel Pack and haize project Clamshell 25

-   **Luggage passthrough:** Yes on the MEC Outpost 40L Travel Pack; No on the haize project Clamshell 25.
-   **Backpack straps:** Hideable on the MEC Outpost 40L Travel Pack; Yes on the haize project Clamshell 25.
-   **Hip belt:** Removable on the MEC Outpost 40L Travel Pack; No on the haize project Clamshell 25.
-   **Water resistant:** No on the MEC Outpost 40L Travel Pack; Yes on the haize project Clamshell 25.

Both have: compression straps, passport pocket, sternum strap, laptop sleeve, water bottle pockets.

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

We checked both bags against the carry-on size limits of 189 airlines. 135 accept both. 0 accept only the MEC Outpost 40L Travel Pack, and 38 accept only the haize project Clamshell 25.

### Only the haize project Clamshell 25 fits

Air Baltic, Air China, Air Malta, Air Niugini, Air Serbia, Air Seychelles, Asiana Airlines, ATA Airlines, Belavia, Blue Air, Bulgaria Air, Cayman Airways, China Eastern, Emirates Airlines, Enter Air, flybe, Icelandair, InselAir, Juneyao Airlines, Liat Airlines, Luxair, Meridiana Fly, Nordwind Airlines, Pakistan International, Royal Brunei Airlines, Ryanair, S7, Shandong Airlines, Shenzhen Airlines, Sun Express, TAP Air Portugal, TAROM, Tianjin Airlines (A320 & E190), TUI, Ukraine International, VIM Airlines (Closed), Volotea, Xiamen.

## MEC Outpost 40L Travel Pack vs. haize project Clamshell 25: which should you pack?

The **MEC Outpost 40L Travel Pack** carries 15L more than the **haize project Clamshell 25** (40L vs. 25L), while the **MEC Outpost 40L Travel Pack** is the lighter pack at 1.4kg (vs. 1.4kg). For carry-on flexibility, the **haize project Clamshell 25** fits 92% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the MEC Outpost 40L Travel Pack; if you want to travel lighter, the MEC Outpost 40L Travel Pack is the better call.