---
url: "https://onebag.travel/compare/4qxz8xxgq5/mammut-lithium-30/qeexab796l/osprey-aether-55/"
title: "Mammut Lithium 30 vs Osprey Aether 55 - One Bag Travel"
description: "Mammut Lithium 30 vs Osprey Aether 55: capacity, weight, dimensions and how many airlines accept each as a carry-on, side by side."
source: "https://onebag.travel/compare/4qxz8xxgq5/mammut-lithium-30/qeexab796l/osprey-aether-55/"
---
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3.  Mammut Lithium 30 vs. Osprey Aether 55

# Mammut Lithium 30 vs. Osprey Aether 55

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

## [Mammut Lithium 30](https://onebag.travel/carryon/4qxz8xxgq5/mammut-lithium-30/)

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

![Front facing view of the Mammut Lithium 30](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1788990380/carryons/mammut-lithium-30-4qxz8xxgq5.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>30 L</td></tr><tr><td>Weight</td><td>0.9 kg</td></tr><tr><td>Dimensions</td><td>54×26×24 cm</td></tr><tr><td>Airline fit</td><td>40%</td></tr><tr><td>Price</td><td>$160</td></tr></tbody></table>

## Feature by feature

| Mammut Lithium 30 | Feature | Osprey Aether 55 |
| --- | --- | --- |
| Storage |
| 5 | Compression | \>5 |
| None | Expanded Capacity | None |
| 0 | Opening | 0 |
| top | Passport | top |
| N | Passthrough | N |
| Carry |
| Y | Backpack | Y |
| Y | Hip Belt | Y |
| removable | Sternum Strap | Y |
| Inside |
| N | Laptop | N |
| 2 | Main Compartments | 4 |
| N | Organizer | N |
| Outside |
| × | Hard Shell | × |
| Y | Rain-fly | Y |
| 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>100% Polyamide, Bluesign, PFC free, recycled</td><td>bluesign® APPROVED 420HD nylon packcloth, PFC-free DWR</td></tr></tbody></table>

## [Osprey Aether 55](https://onebag.travel/carryon/qeexab796l/osprey-aether-55/)

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

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>55 L</td></tr><tr><td>Weight</td><td>2.2 kg</td></tr><tr><td>Dimensions</td><td>83×38×25 cm</td></tr><tr><td>Airline fit</td><td>1%</td></tr><tr><td>Price</td><td>$325</td></tr></tbody></table>

## Key differences between the Mammut Lithium 30 and Osprey Aether 55

-   **Compression straps:** 5 on the Mammut Lithium 30; >5 on the Osprey Aether 55.
-   **Sternum strap:** Removable on the Mammut Lithium 30; Yes on the Osprey Aether 55.
-   **Main compartments:** 2 on the Mammut Lithium 30; 4 on the Osprey Aether 55.

Both have: passport pocket, backpack straps, hip belt, rain cover, 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. 1 accept both. 74 accept only the Mammut Lithium 30, and 0 accept only the Osprey Aether 55.

### Only the Mammut Lithium 30 fits

Adria Airways, Aegean Airlines, Aer Lingus, Aeroflot, Aerolineas Argentinas, Aeromexico, Air Astana, Air Caraibes, Air Europa, Air France, Air India, Air Koryo, Air Mauritius, Air New Zealand, Air Nostrum, Air Tahiti Nui, All Nipon Airways, ANA, Atlas Global, Azul Linhas, Boliviana de Aviacion, British Airways, Caribbean Airlines, China Southern, Conviasa, Copa Airlines, Croatia Air, Cubana de Aviacion, Czech Airlines, EL AL, Finnair, Frontier Airlines, Gol Linhas Aereas, Great Lakes Airlines, Hainan Airlines, Iberia, Indigo, Interjet, Iran Air, Iran Aseman Air, Island Air, Japan Airlines, Jet Airways, Jet2, Kenya Airways, KLM, Korean Air, Kuwait Air, LATAM , Middle East Airlines, Monarch Airlines, Onur Air, Peach, PenAir, Philippine Airlines, Royal Air Morocco, Saudi Arabian Airlines, Sichuan Airlines, SilkAir, Silver Airways, Singapore Airlines, Sky Airlines, Southwest Airlines, SpiceJet, Spirit Airlines, Sun Country, TAAG Angola, TAM Airlines, Thai Airways, Travel Service Airlines, Ural Airlines, Uzbekistan Air, Virgin America, WOW Airlines.

## Mammut Lithium 30 vs. Osprey Aether 55: which should you pack?

The **Osprey Aether 55** carries 25L more than the **Mammut Lithium 30** (30L vs. 55L), while the **Mammut Lithium 30** is the lighter pack at 0.9kg (vs. 2.2kg). For carry-on flexibility, the **Mammut Lithium 30** fits 40% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Osprey Aether 55; if you want to travel lighter, the Mammut Lithium 30 is the better call.