---
url: "https://onebag.travel/compare/088zn2v6l3/osprey-nebula/bnsytm0z9y/attitude-supply-atd1/"
title: "Osprey Nebula vs Attitude Supply ATD1 - One Bag Travel"
description: "Osprey Nebula vs Attitude Supply ATD1: capacity, weight, dimensions and how many airlines accept each as a carry-on, side by side."
source: "https://onebag.travel/compare/088zn2v6l3/osprey-nebula/bnsytm0z9y/attitude-supply-atd1/"
---
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2.  [Carry-On Travel Backpacks](https://onebag.travel/carryons/)
3.  Osprey Nebula vs. Attitude Supply ATD1

# Osprey Nebula vs. Attitude Supply ATD1

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

## [Osprey Nebula](https://onebag.travel/carryon/088zn2v6l3/osprey-nebula/)

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

![Front facing view of the Osprey Nebula](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1601224005/carryons/ospreynebula_amojoe.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>34 L</td></tr><tr><td>Weight</td><td>1 kg</td></tr><tr><td>Dimensions</td><td>49×31×29 cm</td></tr><tr><td>Airline fit</td><td>13%</td></tr><tr><td>Price</td><td>$140</td></tr></tbody></table>

## Feature by feature

| Osprey Nebula | Feature | Attitude Supply ATD1 |
| --- | --- | --- |
| Storage |
| 4 | Compression | 4 |
| None | Expanded Capacity | 55L |
| 1 | Opening | 1 |
| top | Passport | front |
| N | Passthrough | N |
| Carry |
| Y | Backpack | Y |
| removable | Hip Belt | removable |
| Y | Sternum Strap | removable |
| Inside |
| 15in | Laptop | 15in |
| 3 | Main Compartments | 2 |
| Y | Organizer | Y |
| 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>MAIN: 420HD Nylon Packcloth BOTTOM: 420HD Nylon Packcloth</td><td>500d, PU coated Cordura with DWR</td></tr></tbody></table>

## [Attitude Supply ATD1](https://onebag.travel/carryon/bnsytm0z9y/attitude-supply-atd1/)

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

![Front facing view of the Attitude Supply ATD1](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1600983132/carryons/attitude_baczuj.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>20 L</td></tr><tr><td>Weight</td><td>1.5 kg</td></tr><tr><td>Dimensions</td><td>50×30×26 cm</td></tr><tr><td>Airline fit</td><td>17%</td></tr><tr><td>Price</td><td>$447</td></tr></tbody></table>

## Key differences between the Osprey Nebula and Attitude Supply ATD1

-   **Passport pocket:** Top on the Osprey Nebula; Front on the Attitude Supply ATD1.
-   **Sternum strap:** Yes on the Osprey Nebula; Removable on the Attitude Supply ATD1.
-   **Main compartments:** 3 on the Osprey Nebula; 2 on the Attitude Supply ATD1.

Both have: compression straps, backpack straps, hip belt, laptop sleeve, built-in organizer, 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. 25 accept both. 0 accept only the Osprey Nebula, and 7 accept only the Attitude Supply ATD1.

### Only the Attitude Supply ATD1 fits

Copa Airlines, Frontier Airlines, Island Air, PenAir, Southwest Airlines, Spirit Airlines, Sun Country.

## Osprey Nebula vs. Attitude Supply ATD1: which should you pack?

The **Osprey Nebula** carries 14L more than the **Attitude Supply ATD1** (34L vs. 20L), while the **Osprey Nebula** is the lighter pack at 1kg (vs. 1.5kg). For carry-on flexibility, the **Attitude Supply ATD1** fits 17% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Osprey Nebula; if you want to travel lighter, the Osprey Nebula is the better call.