---
url: "https://onebag.travel/compare/fjlyur632m/cotopaxi-allpa-travel-pack-42l-del-dia/h1rqln9ogu/patagonia-tres-mlc-45l/"
title: "Cotopaxi Allpa Travel Pack 42L Del Día vs Patagonia Tres MLC® 45L"
description: "Cotopaxi Allpa Travel Pack 42L Del Día vs Patagonia Tres MLC® 45L: capacity, weight, dimensions and how many airlines accept each as a carry-on, side by side."
source: "https://onebag.travel/compare/fjlyur632m/cotopaxi-allpa-travel-pack-42l-del-dia/h1rqln9ogu/patagonia-tres-mlc-45l/"
---
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2.  [Carry-On Travel Backpacks](https://onebag.travel/carryons/)
3.  Cotopaxi Allpa Travel Pack 42L Del Día vs. Patagonia Tres MLC® 45L

# Cotopaxi Allpa Travel Pack 42L Del Día vs. Patagonia Tres MLC® 45L

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

## [Cotopaxi Allpa Travel Pack 42L Del Día](https://onebag.travel/carryon/fjlyur632m/cotopaxi-allpa-travel-pack-42l-del-dia/)

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

![Front facing view of the Cotopaxi Allpa Travel Pack 42L Del Día](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1621510166/carryons/Cotopaxi_Allpa_42L_Travel_Pack_fx7t3l.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>42 L</td></tr><tr><td>Weight</td><td>1.905 kg</td></tr><tr><td>Dimensions</td><td>55×34×22.5 cm</td></tr><tr><td>Airline fit</td><td>68%</td></tr><tr><td>Price</td><td>$200</td></tr></tbody></table>

## Feature by feature

| Cotopaxi Allpa Travel Pack 42L Del Día | Feature | Patagonia Tres MLC® 45L |
| --- | --- | --- |
| Storage |
| N | Compression | N |
| None | Expanded Capacity | None |
| 1 | Opening | 1 |
| Y | Passport | N |
|  | Passthrough | Y |
| Carry |
| hideable | Backpack | hideable |
| removable | Hip Belt | N |
| Y | Sternum Strap | Y |
| Inside |
| 15in | Laptop | 15in |
| 1 | Main Compartments | 1 |
| Y | Organizer | Y |
| Outside |
| × | Hard Shell | × |
| Y | Rain-fly | N |
| N | Water Bottle Holder | N |
| Y | Water Resistant | Y |

<table class="cmp-material"><tbody><tr><td colspan="2">Material</td></tr><tr><td>100% repurposed nylon</td><td>630-denier nylon, 200-denier 100% recycled polyeste</td></tr></tbody></table>

## [Patagonia Tres MLC® 45L](https://onebag.travel/carryon/h1rqln9ogu/patagonia-tres-mlc-45l/)

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

![Front facing view of the Patagonia Tres MLC® 45L](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1632754332/carryons/Patagonia_Tres_MLC_45L_gbmz36.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>45 L</td></tr><tr><td>Weight</td><td>1.5 kg</td></tr><tr><td>Dimensions</td><td>54×41×18 cm</td></tr><tr><td>Airline fit</td><td>26%</td></tr><tr><td>Price</td><td>$179</td></tr></tbody></table>

## Key differences between the Cotopaxi Allpa Travel Pack 42L Del Día and Patagonia Tres MLC® 45L

-   **Passport pocket:** Yes on the Cotopaxi Allpa Travel Pack 42L Del Día; No on the Patagonia Tres MLC® 45L.
-   **Hip belt:** Removable on the Cotopaxi Allpa Travel Pack 42L Del Día; No on the Patagonia Tres MLC® 45L.
-   **Rain cover:** Yes on the Cotopaxi Allpa Travel Pack 42L Del Día; No on the Patagonia Tres MLC® 45L.

Both have: backpack straps, sternum strap, laptop sleeve, 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. 49 accept both. 80 accept only the Cotopaxi Allpa Travel Pack 42L Del Día, and 0 accept only the Patagonia Tres MLC® 45L.

### Only the Cotopaxi Allpa Travel Pack 42L Del Día fits

Aer Lingus, Aeroflot, Aerolineas Argentinas, Aeromexico, Air Asia, Air Canada, Air France, Air India, Air Macau, Air Mauritius, Air Wisconsin, AirAsiaX, Alaska Airlines, All Nipon Airways, Allegiant Air, American Airlines, ANA, Austrian, Avianca , Azerbaijan Airlines, Bahamasair, Bangkok Airways, Biman Bangladesh, Boliviana de Aviacion, Brussels Airlines, Cambodia Angkor Air, Cathay Pacific, Cayman Airways, Cebu Pacific, China Airlines, CommutAir, Conviasa, Copa Airlines, Croatia Air, Delta Airlines, Dragonair, Ethiopian Airlines, Eurowings, EVA Air, Fiji Airways, Flair Air, Garuda Indonesia, Gol Linhas Aereas, Hawaiian Airlines, Hong Kong Airlines, Indigo, Interjet, Japan Airlines, Jet Airways, jetBlue Airways, Jetstar Airways, Jetstar Asia, Kenya Airways, KLM, Kulula, LATAM , LOT Polish, Lufthansa, Mahan Air, Malaysia Airlines, Mango, Mesa Airlines, Middle East Airlines, Monarch Airlines, Norwegian, Peach, Porter Airlines, Qantas Airways, Republic Airways, SAS Scandinavian, Sky Airlines, Skywest, Inc., South African Airways, SriLankan Airlines, Swiss Int'l Air Lines, Trans States, Turkish Airlines, United Airlines, Vietnam Airlines, Virgin Atlantic.

## Cotopaxi Allpa Travel Pack 42L Del Día vs. Patagonia Tres MLC® 45L: which should you pack?

The **Patagonia Tres MLC® 45L** carries 3L more than the **Cotopaxi Allpa Travel Pack 42L Del Día** (42L vs. 45L), while the **Patagonia Tres MLC® 45L** is the lighter pack at 1.5kg (vs. 1.905kg). For carry-on flexibility, the **Cotopaxi Allpa Travel Pack 42L Del Día** fits 68% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Patagonia Tres MLC® 45L; if you want to travel lighter, the Patagonia Tres MLC® 45L is the better call.