---
url: "https://onebag.travel/compare/k4334kffo5/united-by-blue-revolution-25l-convertible-carryall/l7agtd2du4/topo-travel-bag-40l/"
title: "United by Blue (R)evolution 25L Convertible Carryall vs Topo Travel Bag 40L"
description: "United by Blue (R)evolution 25L Convertible Carryall vs Topo Travel Bag 40L: capacity, weight, dimensions and how many airlines accept each as a carry-on…"
source: "https://onebag.travel/compare/k4334kffo5/united-by-blue-revolution-25l-convertible-carryall/l7agtd2du4/topo-travel-bag-40l/"
---
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3.  United by Blue (R)evolution 25L Convertible Carryall vs. Topo Travel Bag 40L

# United by Blue (R)evolution 25L Convertible Carryall vs. Topo Travel Bag 40L

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

## [United by Blue (R)evolution 25L Convertible Carryall](https://onebag.travel/carryon/k4334kffo5/united-by-blue-revolution-25l-convertible-carryall/)

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

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>25 L</td></tr><tr><td>Weight</td><td>0 kg</td></tr><tr><td>Dimensions</td><td>39×34×13 cm</td></tr><tr><td>Airline fit</td><td>96%</td></tr><tr><td>Price</td><td>$120</td></tr></tbody></table>

## Feature by feature

| United by Blue (R)evolution 25L Convertible Carryall | Feature | Topo Travel Bag 40L |
| --- | --- | --- |
| Storage |
| N | Compression | N |
| None | Expanded Capacity | None |
| 0 | Opening | 1 |
| front | Passport | front |
| N | Passthrough | N |
| Carry |
| hideable | Backpack | hideable |
| N | Hip Belt | removable |
| removable | Sternum Strap | removable |
| Inside |
| 15in | Laptop | 15in |
| 2 | Main Compartments | 4 |
| N | Organizer | N |
| Outside |
| × | Hard Shell | × |
| N | Rain-fly | N |
| 2, side | Water Bottle Holder | 2, side |
| Y | Water Resistant | Y |

<table class="cmp-material"><tbody><tr><td colspan="2">Material</td></tr><tr><td></td><td>1000D recycled nylon,</td></tr></tbody></table>

## [Topo Travel Bag 40L](https://onebag.travel/carryon/l7agtd2du4/topo-travel-bag-40l/)

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

![Front facing view of the Topo Travel Bag 40L](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1617230517/carryons/Topo_Travel_Bag_-_40L_hretnv.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>40 L</td></tr><tr><td>Weight</td><td>1.7 kg</td></tr><tr><td>Dimensions</td><td>57×36×19 cm</td></tr><tr><td>Airline fit</td><td>16%</td></tr><tr><td>Price</td><td>$230</td></tr></tbody></table>

## Key differences between the United by Blue (R)evolution 25L Convertible Carryall and Topo Travel Bag 40L

-   **Opening:** Other on the United by Blue (R)evolution 25L Convertible Carryall; Clamshell on the Topo Travel Bag 40L.
-   **Hip belt:** No on the United by Blue (R)evolution 25L Convertible Carryall; Removable on the Topo Travel Bag 40L.
-   **Main compartments:** 2 on the United by Blue (R)evolution 25L Convertible Carryall; 4 on the Topo Travel Bag 40L.

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

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

We checked both bags against the carry-on size limits of 189 airlines. 31 accept both. 150 accept only the United by Blue (R)evolution 25L Convertible Carryall, and 0 accept only the Topo Travel Bag 40L.

### Only the United by Blue (R)evolution 25L Convertible Carryall fits

Aegean Airlines, Aer Lingus, Aeroflot, Aerolineas Argentinas, Aeromexico, Air Asia, Air Astana, Air Baltic, Air Canada, Air Caraibes, Air China, Air France, Air India, Air Macau, Air Malta, Air Mauritius, Air Nostrum, Air Serbia, Air Seychelles, Air Tahiti, Air Wisconsin, AirAsiaX, Alaska Airlines, All Nipon Airways, Allegiant Air, American Airlines, American Eagle, ANA, Asiana Airlines, ATA Airlines, Atlas Global, Austrian, Avianca , Azerbaijan Airlines, Bahamasair, Bangkok Airways, Belavia, Biman Bangladesh, Blue Air, Boliviana de Aviacion, British Airways, Brussels Airlines, Bulgaria Air, Cambodia Angkor Air, Cathay Pacific, Cayman Airways, Cebu Pacific, China Airlines, China Eastern, CommutAir, Copa Airlines, Czech Airlines, Delta Airlines, Dragonair, easyJet, EL AL, Emirates Airlines, Enter Air, Ethiopian Airlines, Etihad Airways, Eurowings, EVA Air, Fiji Airways, Finnair, Flair Air, flybe, Garuda Indonesia, Gol Linhas Aereas, Gulf Air, Hawaiian Airlines, Hong Kong Airlines, Iberia, Icelandair, Indigo, InselAir, Interjet, Iran Air, Iran Aseman Air, Japan Airlines, Jet Airways, Jet2, jetBlue Airways, Jetstar Airways, Jetstar Asia, Juneyao Airlines, Kenya Airways, KLM, Kulula, Kuwait Air, LATAM , Liat Airlines, LOT Polish, Lufthansa, Luxair, Mahan Air, Malaysia Airlines, Mango, Meridiana Fly, Mesa Airlines, Middle East Airlines, Monarch Airlines, Nordwind Airlines, Norwegian, Oman Air, Onur Air, Pakistan International, Peach, Porter Airlines, Qantas Airways, Qatar Airways, Ravn Alaska, Regional Express, Republic Airways, Royal Brunei Airlines, Royal Jordanian, Ryanair, S7, SAS Scandinavian, Scoot, Shandong Airlines, Shenzhen Airlines, Sky Airlines, Skywest, Inc., South African Airways, Spirit Airlines, SriLankan Airlines, Sun Express, Swiss Int'l Air Lines, TAP Air Portugal, TAROM, Thai Airways, Tianjin Airlines (A320 & E190), Tiger Airways, Trans States, Travel Service Airlines, TUI, Turkish Airlines, Ukraine International, United Airlines, Uzbekistan Air, Vietnam Airlines, VIM Airlines (Closed), Virgin Atlantic, Virgin Australia, VivaColombia, Volaris, Volotea, WestJet, WOW Airlines, Xiamen.

## United by Blue (R)evolution 25L Convertible Carryall vs. Topo Travel Bag 40L: which should you pack?

The **Topo Travel Bag 40L** carries 15L more than the **United by Blue (R)evolution 25L Convertible Carryall** (25L vs. 40L), and the two are closely matched on weight. For carry-on flexibility, the **United by Blue (R)evolution 25L Convertible Carryall** fits 96% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Topo Travel Bag 40L; if you want to travel lighter, the Topo Travel Bag 40L is the better call.