---
url: "https://onebag.travel/compare/h1rqln9ogu/patagonia-tres-mlc-45l/m519mfyqi6/red-oxx-sky-train-convertible-backpack/"
title: "Patagonia Tres MLC® 45L vs Red Oxx Sky Train Convertible Backpack"
description: "Patagonia Tres MLC® 45L vs Red Oxx Sky Train Convertible Backpack: capacity, weight, dimensions and how many airlines accept each as a carry-on, side by side."
source: "https://onebag.travel/compare/h1rqln9ogu/patagonia-tres-mlc-45l/m519mfyqi6/red-oxx-sky-train-convertible-backpack/"
---
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3.  Patagonia Tres MLC® 45L vs. Red Oxx Sky Train Convertible Backpack

# Patagonia Tres MLC® 45L vs. Red Oxx Sky Train Convertible Backpack

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

## [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>

## Feature by feature

| Patagonia Tres MLC® 45L | Feature | Red Oxx Sky Train Convertible Backpack |
| --- | --- | --- |
| Storage |
| N | Compression | N |
| None | Expanded Capacity | None |
| 1 | Opening | 0 |
| N | Passport | side |
| Y | Passthrough | N |
| Carry |
| hideable | Backpack | hideable |
| N | Hip Belt | N |
| Y | Sternum Strap | Y |
| Inside |
| 15in | Laptop | 15in |
| 1 | Main Compartments | 4 |
| Y | Organizer | Y |
| Outside |
| × | Hard Shell | × |
| N | 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>630-denier nylon, 200-denier 100% recycled polyeste</td><td>1000 weight urethane coated, Dupont certified CORDURA® Brand Nylon</td></tr></tbody></table>

## [Red Oxx Sky Train Convertible Backpack](https://onebag.travel/carryon/m519mfyqi6/red-oxx-sky-train-convertible-backpack/)

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

![Front facing view of the Red Oxx Sky Train Convertible Backpack](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1788990548/carryons/red-oxx-sky-train-convertible-backpack-m519mfyqi6.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>38 L</td></tr><tr><td>Weight</td><td>1.8 kg</td></tr><tr><td>Dimensions</td><td>51×33×23 cm</td></tr><tr><td>Airline fit</td><td>71%</td></tr><tr><td>Price</td><td>$400</td></tr></tbody></table>

## Key differences between the Patagonia Tres MLC® 45L and Red Oxx Sky Train Convertible Backpack

-   **Opening:** Clamshell on the Patagonia Tres MLC® 45L; Other on the Red Oxx Sky Train Convertible Backpack.
-   **Passport pocket:** No on the Patagonia Tres MLC® 45L; Side on the Red Oxx Sky Train Convertible Backpack.
-   **Luggage passthrough:** Yes on the Patagonia Tres MLC® 45L; No on the Red Oxx Sky Train Convertible Backpack.
-   **Main compartments:** 1 on the Patagonia Tres MLC® 45L; 4 on the Red Oxx Sky Train Convertible Backpack.

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. 0 accept only the Patagonia Tres MLC® 45L, and 85 accept only the Red Oxx Sky Train Convertible Backpack.

### Only the Red Oxx Sky Train Convertible Backpack 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, Oman Air, Peach, Porter Airlines, Qantas Airways, Republic Airways, Royal Jordanian, SAS Scandinavian, Scoot, Sky Airlines, Skywest, Inc., South African Airways, SriLankan Airlines, Swiss Int'l Air Lines, Tiger Airways, Trans States, Turkish Airlines, United Airlines, Vietnam Airlines, Virgin Atlantic, WestJet.

## Patagonia Tres MLC® 45L vs. Red Oxx Sky Train Convertible Backpack: which should you pack?

The **Patagonia Tres MLC® 45L** carries 7L more than the **Red Oxx Sky Train Convertible Backpack** (45L vs. 38L), while the **Patagonia Tres MLC® 45L** is the lighter pack at 1.5kg (vs. 1.8kg). For carry-on flexibility, the **Red Oxx Sky Train Convertible Backpack** fits 71% 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.