---
url: "https://onebag.travel/compare/cfo1f254gp/rei-co-op-trail-pack-25/k9rctz38bn/osprey-sirrus-24/"
title: "REI Co-op Trail Pack 25 vs Osprey Sirrus 24 - One Bag Travel"
description: "REI Co-op Trail Pack 25 vs Osprey Sirrus 24: capacity, weight, dimensions and how many airlines accept each as a carry-on, side by side."
source: "https://onebag.travel/compare/cfo1f254gp/rei-co-op-trail-pack-25/k9rctz38bn/osprey-sirrus-24/"
---
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3.  REI Co-op Trail Pack 25 vs. Osprey Sirrus 24

# REI Co-op Trail Pack 25 vs. Osprey Sirrus 24

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

## [REI Co-op Trail Pack 25](https://onebag.travel/carryon/cfo1f254gp/rei-co-op-trail-pack-25/)

by [REI Co-op](https://onebag.travel/carryons/?brands=REI Co-op)

![Front facing view of the REI Co-op Trail Pack 25](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1601602563/carryons/reicoop_o83w5i.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>25 L</td></tr><tr><td>Weight</td><td>0.8 kg</td></tr><tr><td>Dimensions</td><td>46×33×20 cm</td></tr><tr><td>Airline fit</td><td>94%</td></tr><tr><td>Price</td><td>$100</td></tr></tbody></table>

## Feature by feature

| REI Co-op Trail Pack 25 | Feature | Osprey Sirrus 24 |
| --- | --- | --- |
| Storage |
| 2 | Compression | 4 |
| None | Expanded Capacity | None |
| 0 | Opening | 0 |
| top | Passport | top |
| N | Passthrough | N |
| Carry |
| Y | Backpack | Y |
| removable | Hip Belt | Y |
| Y | Sternum Strap | Y |
| Inside |
| N | Laptop | N |
| 3 | Main Compartments | 3 |
| N | Organizer | N |
| Outside |
| × | Hard Shell | × |
| Y | Rain-fly | Y |
| 2, side | Water Bottle Holder | 2, side |
| Y | Water Resistant | N |

<table class="cmp-material"><tbody><tr><td colspan="2">Material</td></tr><tr><td>210-denier ripstop nylon</td><td>bluesign® APPROVED 210D recycled honey comb nylon, PFC/PFAS-free DWR</td></tr></tbody></table>

## [Osprey Sirrus 24](https://onebag.travel/carryon/k9rctz38bn/osprey-sirrus-24/)

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

![Front facing view of the Osprey Sirrus 24](https://res.cloudinary.com/obt/image/upload/c_fill,w_400/v1788990418/carryons/osprey-sirrus-24-k9rctz38bn.webp)

<table class="table table-sm cmp-spec mt-2"><tbody><tr><td>Capacity</td><td>24 L</td></tr><tr><td>Weight</td><td>1.2 kg</td></tr><tr><td>Dimensions</td><td>55×34×24 cm</td></tr><tr><td>Airline fit</td><td>39%</td></tr><tr><td>Price</td><td>$180</td></tr></tbody></table>

## Key differences between the REI Co-op Trail Pack 25 and Osprey Sirrus 24

-   **Compression straps:** 2 on the REI Co-op Trail Pack 25; 4 on the Osprey Sirrus 24.
-   **Hip belt:** Removable on the REI Co-op Trail Pack 25; Yes on the Osprey Sirrus 24.
-   **Water resistant:** Yes on the REI Co-op Trail Pack 25; No on the Osprey Sirrus 24.

Both have: passport pocket, backpack straps, sternum strap, rain cover, water bottle pockets.

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

We checked both bags against the carry-on size limits of 189 airlines. 73 accept both. 104 accept only the REI Co-op Trail Pack 25, and 0 accept only the Osprey Sirrus 24.

### Only the REI Co-op Trail Pack 25 fits

Air Asia, Air Baltic, Air Canada, Air China, Air Macau, Air Malta, Air Serbia, Air Seychelles, Air Wisconsin, AirAsiaX, Alaska Airlines, Allegiant Air, American Airlines, American Eagle, Asiana Airlines, ATA Airlines, Austrian, Avianca , Azerbaijan Airlines, Bahamasair, Bangkok Airways, Belavia, Biman Bangladesh, Blue Air, Brussels Airlines, Bulgaria Air, Cambodia Angkor Air, Cathay Pacific, Cayman Airways, Cebu Pacific, China Airlines, China Eastern, CommutAir, Croatia Air, Delta Airlines, Dragonair, easyJet, Emirates Airlines, Enter Air, Ethiopian Airlines, Etihad Airways, Eurowings, EVA Air, Fiji Airways, Flair Air, flybe, Garuda Indonesia, Hawaiian Airlines, Hong Kong Airlines, Icelandair, InselAir, jetBlue Airways, Jetstar Airways, Jetstar Asia, Juneyao Airlines, Kulula, Liat Airlines, LOT Polish, Lufthansa, Luxair, Mahan Air, Malaysia Airlines, Mango, Meridiana Fly, Mesa Airlines, Nordwind Airlines, Norwegian, Oman Air, Pakistan International, Porter Airlines, Qantas Airways, Qatar Airways, Ravn Alaska, Regional Express, Republic Airways, Royal Brunei Airlines, Royal Jordanian, Ryanair, S7, SAS Scandinavian, Scoot, Shandong Airlines, Shenzhen Airlines, Skywest, Inc., South African Airways, SriLankan Airlines, Sun Express, Swiss Int'l Air Lines, TAP Air Portugal, TAROM, Tianjin Airlines (A320 & E190), Tiger Airways, Trans States, TUI, Turkish Airlines, Ukraine International, United Airlines, Vietnam Airlines, VIM Airlines (Closed), Virgin Atlantic, Virgin Australia, Volotea, WestJet, Xiamen.

## REI Co-op Trail Pack 25 vs. Osprey Sirrus 24: which should you pack?

The **REI Co-op Trail Pack 25** carries 1L more than the **Osprey Sirrus 24** (25L vs. 24L), while the **REI Co-op Trail Pack 25** is the lighter pack at 0.8kg (vs. 1.2kg). For carry-on flexibility, the **REI Co-op Trail Pack 25** fits 94% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the REI Co-op Trail Pack 25; if you want to travel lighter, the REI Co-op Trail Pack 25 is the better call.