---
url: "https://onebag.travel/compare/eqltmpswmj/opposethis-invisible-rolltop/erxfjwo6e2/ortlieb-velocity-ps/"
title: "OPPOSETHIS Invisible Rolltop vs Ortlieb Velocity PS"
description: "OPPOSETHIS Invisible Rolltop vs Ortlieb Velocity PS: capacity, weight, dimensions and how many airlines accept each as a carry-on, side by side."
source: "https://onebag.travel/compare/eqltmpswmj/opposethis-invisible-rolltop/erxfjwo6e2/ortlieb-velocity-ps/"
---
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2.  [Carry-On Travel Backpacks](https://onebag.travel/carryons/)
3.  OPPOSETHIS Invisible Rolltop vs. Ortlieb Velocity PS

# OPPOSETHIS Invisible Rolltop vs. Ortlieb Velocity PS

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

## [OPPOSETHIS Invisible Rolltop](https://onebag.travel/carryon/eqltmpswmj/opposethis-invisible-rolltop/)

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

![Front facing view of the OPPOSETHIS Invisible Rolltop](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1630640264/carryons/Opposethis_invisible_rolltop_erse1p.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>21 L</td></tr><tr><td>Weight</td><td>0.9 kg</td></tr><tr><td>Dimensions</td><td>45×39×15 cm</td></tr><tr><td>Airline fit</td><td>59%</td></tr><tr><td>Price</td><td>$185</td></tr></tbody></table>

## Feature by feature

| OPPOSETHIS Invisible Rolltop | Feature | Ortlieb Velocity PS |
| --- | --- | --- |
| Storage |
| N | Compression | N |
| 26L | Expanded Capacity | None |
| 2 | Opening | 2 |
| N | Passport | N |
| N | Passthrough | N |
| Carry |
| Y | Backpack | Y |
| N | Hip Belt | removable |
| removable | Sternum Strap | removable |
| Inside |
| 17in | Laptop | 15in |
| 1 | Main Compartments | 1 |
| N | Organizer |  |
| 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>800x600D lightweight waterproof nylon-polyester blend</td><td>PS33</td></tr></tbody></table>

## [Ortlieb Velocity PS](https://onebag.travel/carryon/erxfjwo6e2/ortlieb-velocity-ps/)

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

![Front facing view of the Ortlieb Velocity PS](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1630921805/carryons/Ortlieb_Velocity_PS_eugw6c.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>23 L</td></tr><tr><td>Weight</td><td>0.79 kg</td></tr><tr><td>Dimensions</td><td>50×30×16 cm</td></tr><tr><td>Airline fit</td><td>92%</td></tr><tr><td>Price</td><td>$150</td></tr></tbody></table>

## Key differences between the OPPOSETHIS Invisible Rolltop and Ortlieb Velocity PS

-   **Hip belt:** No on the OPPOSETHIS Invisible Rolltop; Removable on the Ortlieb Velocity PS.
-   **Laptop sleeve:** 17in on the OPPOSETHIS Invisible Rolltop; 15in on the Ortlieb Velocity PS.

Both have: backpack straps, sternum strap, water resistant.

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

We checked both bags against the carry-on size limits of 189 airlines. 111 accept both. 1 accept only the OPPOSETHIS Invisible Rolltop, and 62 accept only the Ortlieb Velocity PS.

### Only the OPPOSETHIS Invisible Rolltop fits

Gulf Air.

### Only the Ortlieb Velocity PS fits

Aerolineas Argentinas, Air Asia, Air France, Air India, Air Macau, Air Mauritius, Air Niugini, Air Wisconsin, AirAsiaX, Alaska Airlines, Allegiant Air, American Airlines, Avianca , Bahamasair, Bangkok Airways, Biman Bangladesh, Boliviana de Aviacion, Cambodia Angkor Air, Cathay Pacific, Cayman Airways, Cebu Pacific, China Airlines, CommutAir, Conviasa, Copa Airlines, Delta Airlines, Dragonair, Emirates Airlines, EVA Air, flybe, Garuda Indonesia, Hawaiian Airlines, Hong Kong Airlines, Indigo, InselAir, Jet Airways, jetBlue Airways, Jetstar Airways, Jetstar Asia, Kenya Airways, KLM, Kulula, LATAM , Liat Airlines, Malaysia Airlines, Mango, Pakistan International, Qantas Airways, Qatar Airways, Republic Airways, Royal Brunei Airlines, Scoot, Sky Airlines, Skywest, Inc., South African Airways, SriLankan Airlines, Tiger Airways, Trans States, United Airlines, Vietnam Airlines, Virgin Atlantic, WestJet.

## OPPOSETHIS Invisible Rolltop vs. Ortlieb Velocity PS: which should you pack?

The **Ortlieb Velocity PS** carries 2L more than the **OPPOSETHIS Invisible Rolltop** (21L vs. 23L), while the **Ortlieb Velocity PS** is the lighter pack at 0.79kg (vs. 0.9kg). For carry-on flexibility, the **Ortlieb Velocity PS** fits 92% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Ortlieb Velocity PS; if you want to travel lighter, the Ortlieb Velocity PS is the better call.