---
url: "https://onebag.travel/compare/m519mfyqi6/red-oxx-sky-train-convertible-backpack/x572q06ooc/gregory-border-18/"
title: "Red Oxx Sky Train Convertible Backpack vs Gregory Border 18"
description: "Red Oxx Sky Train Convertible Backpack vs Gregory Border 18: capacity, weight, dimensions and how many airlines accept each as a carry-on, side by side."
source: "https://onebag.travel/compare/m519mfyqi6/red-oxx-sky-train-convertible-backpack/x572q06ooc/gregory-border-18/"
---
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3.  Red Oxx Sky Train Convertible Backpack vs. Gregory Border 18

# Red Oxx Sky Train Convertible Backpack vs. Gregory Border 18

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

## [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>

## Feature by feature

| Red Oxx Sky Train Convertible Backpack | Feature | Gregory Border 18 |
| --- | --- | --- |
| Storage |
| N | Compression | N |
| None | Expanded Capacity | None |
| 0 | Opening | 0 |
| side | Passport | top |
| N | Passthrough | Y |
| Carry |
| hideable | Backpack | Y |
| N | Hip Belt | N |
| Y | Sternum Strap | Y |
| Inside |
| 15in | Laptop | 15in |
| 4 | 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>1000 weight urethane coated, Dupont certified CORDURA® Brand Nylon</td><td>210D High Density Nylon</td></tr></tbody></table>

## [Gregory Border 18](https://onebag.travel/carryon/x572q06ooc/gregory-border-18/)

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

![Front facing view of the Gregory Border 18](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1788990368/carryons/gregory-border-18-x572q06ooc.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>18 L</td></tr><tr><td>Weight</td><td>0.8 kg</td></tr><tr><td>Dimensions</td><td>47×29×16 cm</td></tr><tr><td>Airline fit</td><td>93%</td></tr><tr><td>Price</td><td>$120</td></tr></tbody></table>

## Key differences between the Red Oxx Sky Train Convertible Backpack and Gregory Border 18

-   **Passport pocket:** Side on the Red Oxx Sky Train Convertible Backpack; Top on the Gregory Border 18.
-   **Luggage passthrough:** No on the Red Oxx Sky Train Convertible Backpack; Yes on the Gregory Border 18.
-   **Backpack straps:** Hideable on the Red Oxx Sky Train Convertible Backpack; Yes on the Gregory Border 18.

Both have: 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. 134 accept both. 0 accept only the Red Oxx Sky Train Convertible Backpack, and 41 accept only the Gregory Border 18.

### Only the Gregory Border 18 fits

Air Baltic, Air China, Air Malta, Air Niugini, Air Serbia, Air Seychelles, Asiana Airlines, ATA Airlines, Belavia, Blue Air, Bulgaria Air, China Eastern, Emirates Airlines, Enter Air, Etihad Airways, flybe, Icelandair, InselAir, Juneyao Airlines, Liat Airlines, Luxair, Meridiana Fly, Nordwind Airlines, Pakistan International, Qatar Airways, Regional Express, 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), Virgin Australia, Volotea, Xiamen.

## Red Oxx Sky Train Convertible Backpack vs. Gregory Border 18: which should you pack?

The **Red Oxx Sky Train Convertible Backpack** carries 20L more than the **Gregory Border 18** (38L vs. 18L), while the **Gregory Border 18** is the lighter pack at 0.8kg (vs. 1.8kg). For carry-on flexibility, the **Gregory Border 18** fits 93% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Red Oxx Sky Train Convertible Backpack; if you want to travel lighter, the Gregory Border 18 is the better call.