---
url: "https://onebag.travel/compare/ayd517mvmi/alpha-one-niner-sert-penumbra-2-0-backpack/jnip5or0b7/osprey-aoede-airspeed-backpack/"
title: "Alpha One-Niner SERT, PENUMBRA 2.0 Backpack vs Osprey Aoede Airspeed Backpack"
description: "Alpha One-Niner SERT, PENUMBRA 2.0 Backpack vs Osprey Aoede Airspeed Backpack: capacity, weight, dimensions and how many airlines accept each as a carry-on…"
source: "https://onebag.travel/compare/ayd517mvmi/alpha-one-niner-sert-penumbra-2-0-backpack/jnip5or0b7/osprey-aoede-airspeed-backpack/"
---
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2.  [Carry-On Travel Backpacks](https://onebag.travel/carryons/)
3.  Alpha One-Niner SERT, PENUMBRA 2.0 Backpack vs. Osprey Aoede Airspeed Backpack

# Alpha One-Niner SERT, PENUMBRA 2.0 Backpack vs. Osprey Aoede Airspeed Backpack

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

## [Alpha One-Niner SERT, PENUMBRA 2.0 Backpack](https://onebag.travel/carryon/ayd517mvmi/alpha-one-niner-sert-penumbra-2-0-backpack/)

by [Alpha One-Niner](https://onebag.travel/carryons/?brands=Alpha One-Niner)

![Front facing view of the Alpha One-Niner SERT, PENUMBRA 2.0 Backpack](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1788990332/carryons/alpha-one-niner-sert-penumbra-2-0-backpack-ayd517mvmi.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>1.5 kg</td></tr><tr><td>Dimensions</td><td>47×30×14 cm</td></tr><tr><td>Airline fit</td><td>93%</td></tr><tr><td>Price</td><td>$255</td></tr></tbody></table>

## Feature by feature

| Alpha One-Niner SERT, PENUMBRA 2.0 Backpack | Feature | Osprey Aoede Airspeed Backpack |
| --- | --- | --- |
| Storage |
| 2 | Compression | N |
| None | Expanded Capacity | None |
| 1 | Opening | 0 |
| front | Passport | front |
| Y | Passthrough | Y |
| Carry |
| Y | Backpack | Y |
| optional | Hip Belt | N |
| removable | Sternum Strap | N |
| Inside |
| 16in | Laptop | 16in |
| 5 | Main Compartments | 5 |
| 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>Available in: X-Pac X42, 500D, 630D HD</td><td>840D ballistic polyester, DWR treatment</td></tr></tbody></table>

## [Osprey Aoede Airspeed Backpack](https://onebag.travel/carryon/jnip5or0b7/osprey-aoede-airspeed-backpack/)

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

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>21 L</td></tr><tr><td>Weight</td><td>1.1 kg</td></tr><tr><td>Dimensions</td><td>47×29×23 cm</td></tr><tr><td>Airline fit</td><td>73%</td></tr><tr><td>Price</td><td>$140</td></tr></tbody></table>

## Key differences between the Alpha One-Niner SERT, PENUMBRA 2.0 Backpack and Osprey Aoede Airspeed Backpack

-   **Compression straps:** 2 on the Alpha One-Niner SERT, PENUMBRA 2.0 Backpack; No on the Osprey Aoede Airspeed Backpack.
-   **Opening:** Clamshell on the Alpha One-Niner SERT, PENUMBRA 2.0 Backpack; Other on the Osprey Aoede Airspeed Backpack.
-   **Hip belt:** Optional on the Alpha One-Niner SERT, PENUMBRA 2.0 Backpack; No on the Osprey Aoede Airspeed Backpack.
-   **Sternum strap:** Removable on the Alpha One-Niner SERT, PENUMBRA 2.0 Backpack; No on the Osprey Aoede Airspeed Backpack.

Both have: passport pocket, luggage passthrough, backpack straps, 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. 138 accept both. 37 accept only the Alpha One-Niner SERT, PENUMBRA 2.0 Backpack, and 0 accept only the Osprey Aoede Airspeed Backpack.

### Only the Alpha One-Niner SERT, PENUMBRA 2.0 Backpack 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, flybe, Icelandair, InselAir, Juneyao Airlines, Liat Airlines, Luxair, Meridiana Fly, Nordwind Airlines, Pakistan International, 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), Volotea, Xiamen.

## Alpha One-Niner SERT, PENUMBRA 2.0 Backpack vs. Osprey Aoede Airspeed Backpack: which should you pack?

The **Alpha One-Niner SERT, PENUMBRA 2.0 Backpack** carries the same capacity as the **Osprey Aoede Airspeed Backpack** (21L vs. 21L), while the **Osprey Aoede Airspeed Backpack** is the lighter pack at 1.1kg (vs. 1.5kg). For carry-on flexibility, the **Alpha One-Niner SERT, PENUMBRA 2.0 Backpack** fits 93% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Alpha One-Niner SERT, PENUMBRA 2.0 Backpack; if you want to travel lighter, the Osprey Aoede Airspeed Backpack is the better call.