CamelBak Cloud Walker 18 Crux Reservoir Hiking Hydration Backpack
- 85 fluid ounces, 2.5 liter Crux reservoir
- 15.5L cargo capacity, 3 pockets
- Shoulder, hip and sternum straps, removable waist strap
- Trekking pole carry system
- 10.24 x 18.11 inches
- Lifetime warranty, Got Your Bak
Last refreshed Oct 2, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A daypack with a large reservoir and room for a day's gear, built for hiking and snowshoeing. It is bulkier than a bike-focused hydration vest.
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ASIN: B0D9D1L8M1Model: 2531004000PCategory: Hydration Packs
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Overview
A hiker heading out for the day gets a ventilated back panel, side cargo pockets and compression straps around a Crux reservoir. A zippered phone pocket and a pole carry system are part of the layout.
Sustainable fabrics and body mapping on the Air Support Back Panel target ventilation. A removable waist strap adds stability when a load needs it. It suits short hikes through full days out.
Who it's for
Day hikers carrying layers, food and trekking poles are the match. Riders after a minimal bike pack should look elsewhere.
Pros and cons
- Large cargo space
- Large reservoir included
- Trekking pole carry system
- Removable waist strap
- Larger than minimal packs
- Side pockets are stretch style
Performance notes
The back panel uses body mapping to vent heat where it builds up. Compression straps pull cargo close to the spine, and the waist strap transfers some weight to the hips.
Where it stands among hydration packs
- #4 most-searched brand and model of the 7 hydration packs lines we track (by search demand, not sales).
From the specs of the 14 hydration packs we list; not a test result.
Specifications
| Model | 2531004000P |
|---|---|
| Dimensions & fit | |
| Item Dimensions W x H | 10.24"W x 18.11"H |
| Capacity & performance | |
| Capacity | 85 fluid ounces |
| Tank Volume | 2.5 liters |
| Construction & materials | |
| Material Type | Nylon, polyester |
| Color | Black 2.0 |
| Included components | |
| Included Components | Pack and hydration reservoir |
| Warranty & support | |
| Warranty Description | Got Your Bak lifetime warranty |
| Other details | |
| Sport Type | Adventuring, outdoors, snowshoeing |
| Strap Type | Shoulder, hip, sternum |
| Number Of Pockets | 3 |
| Pocket Description | 15.5L cargo capacity, exterior zip pocket, side stretch pockets |
Closest rivals on specs
CamelBak M.U.L.E. 12 Mountain Bike Hydration Pack- Tank Volume 2.5 vs 3 liters (-17%)
CamelBak M.U.L.E. Tactical Hydration Backpack- Tank Volume 2.5 vs 3 liters (-17%)
Frequently asked questions
How do I carry trekking poles on the Cloud Walker 18?
The description names a trekking pole carry system and compression straps. No step-by-step instructions are given.
How much water does the Cloud Walker 18 carry?
The Crux reservoir holds 85 fluid ounces, listed as 2.5 liters.
Is the Cloud Walker 18 for biking?
It is listed for adventuring, outdoors and snowshoeing, and described as a hiking daypack.