---
url: "https://onebag.travel/compare/qeexab796l/osprey-aether-55/vmjrlm0zoh/nemo-equipment-persist-womens-45l/"
title: "Osprey Aether 55 vs Nemo Equipment Persist Womens 45L"
description: "Osprey Aether 55 vs Nemo Equipment Persist Womens 45L: capacity, weight, dimensions and how many airlines accept each as a carry-on, side by side."
source: "https://onebag.travel/compare/qeexab796l/osprey-aether-55/vmjrlm0zoh/nemo-equipment-persist-womens-45l/"
---
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3.  Osprey Aether 55 vs. Nemo Equipment Persist Womens 45L

# Osprey Aether 55 vs. Nemo Equipment Persist Womens 45L

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

## [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>

## Feature by feature

| Osprey Aether 55 | Feature | Nemo Equipment Persist Womens 45L |
| --- | --- | --- |
| 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 |
| Y | Sternum Strap | Y |
| Inside |
| N | Laptop | N |
| 4 | Main Compartments | 8 |
| N | Organizer | N |
| Outside |
| × | Hard Shell | × |
| Y | 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>bluesign® APPROVED 420HD nylon packcloth, PFC-free DWR</td><td>300D/900D ripstop weave</td></tr></tbody></table>

## [Nemo Equipment Persist Womens 45L](https://onebag.travel/carryon/vmjrlm0zoh/nemo-equipment-persist-womens-45l/)

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

![Front facing view of the Nemo Equipment Persist Womens 45L](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1788990489/carryons/nemo-equipment-persist-womens-45l-vmjrlm0zoh.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>45 L</td></tr><tr><td>Weight</td><td>1.6 kg</td></tr><tr><td>Dimensions</td><td>64×34×33 cm</td></tr><tr><td>Airline fit</td><td>1%</td></tr><tr><td>Price</td><td>$260</td></tr></tbody></table>

## Key differences between the Osprey Aether 55 and Nemo Equipment Persist Womens 45L

-   **Compression straps:** >5 on the Osprey Aether 55; 5 on the Nemo Equipment Persist Womens 45L.
-   **Main compartments:** 4 on the Osprey Aether 55; 8 on the Nemo Equipment Persist Womens 45L.
-   **Rain cover:** Yes on the Osprey Aether 55; No on the Nemo Equipment Persist Womens 45L.

Both have: passport pocket, backpack straps, hip belt, sternum strap, 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. Every airline that takes one takes the other.

## Osprey Aether 55 vs. Nemo Equipment Persist Womens 45L: which should you pack?

The **Osprey Aether 55** carries 10L more than the **Nemo Equipment Persist Womens 45L** (55L vs. 45L), while the **Nemo Equipment Persist Womens 45L** is the lighter pack at 1.6kg (vs. 2.2kg). For carry-on flexibility, the **Osprey Aether 55** fits 1% 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 Nemo Equipment Persist Womens 45L is the better call.