---
url: "https://onebag.travel/compare/4qxz8xxgq5/mammut-lithium-30/cfo1f254gp/rei-co-op-trail-pack-25/"
title: "Mammut Lithium 30 vs REI Co-op Trail Pack 25"
description: "Mammut Lithium 30 vs REI Co-op Trail Pack 25: 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/cfo1f254gp/rei-co-op-trail-pack-25/"
---
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3.  Mammut Lithium 30 vs. REI Co-op Trail Pack 25

# Mammut Lithium 30 vs. REI Co-op Trail Pack 25

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 | REI Co-op Trail Pack 25 |
| --- | --- | --- |
| Storage |
| 5 | Compression | 2 |
| None | Expanded Capacity | None |
| 0 | Opening | 0 |
| top | Passport | top |
| N | Passthrough | N |
| Carry |
| Y | Backpack | Y |
| Y | Hip Belt | removable |
| removable | Sternum Strap | Y |
| Inside |
| N | Laptop | N |
| 2 | Main Compartments | 3 |
| 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>210-denier ripstop nylon</td></tr></tbody></table>

## [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>

## Key differences between the Mammut Lithium 30 and REI Co-op Trail Pack 25

-   **Compression straps:** 5 on the Mammut Lithium 30; 2 on the REI Co-op Trail Pack 25.
-   **Hip belt:** Yes on the Mammut Lithium 30; Removable on the REI Co-op Trail Pack 25.
-   **Sternum strap:** Removable on the Mammut Lithium 30; Yes on the REI Co-op Trail Pack 25.
-   **Main compartments:** 2 on the Mammut Lithium 30; 3 on the REI Co-op Trail Pack 25.

Both have: passport pocket, backpack straps, 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. 74 accept both. 1 accept only the Mammut Lithium 30, and 103 accept only the REI Co-op Trail Pack 25.

### Only the Mammut Lithium 30 fits

Great Lakes Airlines.

### 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, 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.

## Mammut Lithium 30 vs. REI Co-op Trail Pack 25: which should you pack?

The **Mammut Lithium 30** carries 5L more than the **REI Co-op Trail Pack 25** (30L vs. 25L), while the **REI Co-op Trail Pack 25** is the lighter pack at 0.8kg (vs. 0.9kg). 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 Mammut Lithium 30; if you want to travel lighter, the REI Co-op Trail Pack 25 is the better call.