When it comes to hydration backpacks, CamelBak is one of the most trusted names in the game. With decades of experience crafting packs that balance comfort, functionality, and durability, they’ve become a go-to brand for cyclists, hikers, and trail runners. One of their standout products is the CamelBak M.U.L.E. 12 Hydration Backpack with a 2L bladder, designed for those who want to carry just enough gear and water for a long day outdoors without unnecessary bulk.
Design & Build Quality
The CamelBak M.U.L.E. 12 features a streamlined, compact design that prioritises efficiency without compromising storage space. Made from durable, lightweight materials, it’s built to withstand repeated use in rugged environments. The pack has a sleek, low-profile shape that hugs your back, reducing bounce and making it ideal for active pursuits like mountain biking or fast hiking.
CamelBak has chosen high-quality nylon with a water-resistant coating for the exterior, helping to protect your gear from light rain and trail spray. The zippers are sturdy and smooth-running, while the pull tabs are glove-friendly — a small but important detail for cyclists and cold-weather adventurers.
Hydration System
The heart of this pack is the 2L Crux® Reservoir, which delivers 25% more water per sip compared to older CamelBak bladders. The wide mouth opening makes filling and cleaning straightforward, and the quick-link system allows the hose to detach easily for refills without removing the whole reservoir from the pack.
The drinking tube routes neatly along the shoulder strap and includes an on/off lever to prevent leaks — an essential feature when you’re moving at pace. The bite valve is comfortable to use and self-seals after each sip, which means you don’t waste water on the trail.
Comfort & Fit
One of the strongest selling points of the M.U.L.E. 12 is its Air Support™ back panel, designed to maximise ventilation and keep your back cool during exertion. This panel combines a breathable mesh with strategically placed foam to allow airflow while maintaining a close, stable fit.
The adjustable sternum strap and removable waist belt help customise the fit to your body and activity. For cyclists, the compact profile means it won’t interfere with your movement or balance, while hikers will appreciate the way it sits securely without shifting.
Storage & Organisation
Although compact, the M.U.L.E. 12 offers 12 litres of total capacity, which is more than enough for essentials like snacks, a lightweight jacket, tools, and a first aid kit.
Storage features include:
- Main compartment with reservoir sleeve and extra room for gear
- Front tool organiser pocket for bike repair kits or smaller items
- Stretch overflow pocket for quickly stashing a rain shell or gloves
- Side compression straps to stabilise the load
- Helmet carry hooks for cyclists
- Integrated tool roll (in some versions) to keep maintenance gear tidy
The thoughtful pocket placement means you won’t need to dig around to find what you need, and the compartments are easy to access even with gloves on.
Performance on the Trail
The M.U.L.E. 12 really shines in use. On a mountain bike ride, the low centre of gravity and snug fit keep it from bouncing, even on rough terrain. The 2L bladder provides enough water for several hours without weighing you down, and the ability to sip on the go means you don’t have to stop to hydrate.
For day hikes, the pack has enough room for your essentials plus a light lunch. The breathable back panel makes a noticeable difference on hot days, helping to prevent the sweaty back syndrome that plagues many packs.
Even during fast-paced trail runs, the pack remains stable — though some runners may prefer a smaller hydration vest if minimal weight is the priority.
Durability & Maintenance
CamelBak gear has a reputation for lasting, and the M.U.L.E. 12 is no exception. The stitching, zippers, and fabric feel premium and rugged. The Crux reservoir is also durable, with a bite valve that resists wear over time.
Cleaning is straightforward — the bladder can be turned inside out for drying, and the hose is detachable for easier maintenance. CamelBak also offers a lifetime guarantee against manufacturing defects, adding peace of mind.
Pros & Cons
Pros:
- Lightweight and compact
- Excellent ventilation system
- Stable fit for active sports
- Efficient 2L hydration system
- Smart pocket organisation
- Durable, weather-resistant materials
Cons:
- 2L may be too small for ultra-long hikes without refill points
- Limited space for bulky gear
- Price is on the higher side compared to budget hydration packs
Who Is the CamelBak M.U.L.E. 12 Hydration Backpack For?
The CamelBak M.U.L.E. 12 is perfect for:
- Mountain bikers who need a secure, bounce-free pack
- Day hikers who want hydration and organisation in a light package
- Trail runners tackling longer distances where a vest isn’t enough
- Outdoor adventurers seeking a durable, all-round hydration pack
If you need to carry heavy winter gear or multiple days’ worth of supplies, you’ll want a larger pack. But for most active day trips, the M.U.L.E. 12 hits the sweet spot between capacity, comfort, and performance.
Verdict
The CamelBak M.U.L.E. 12 Hydration Backpack lives up to its reputation as a dependable, high-performance hydration solution for a variety of outdoor activities. With a clever balance of comfort, storage, and hydration efficiency, it’s a pack that disappears on your back — which is exactly what you want when you’re focusing on the trail ahead.
If you’re looking for a hydration pack that works just as well for cycling as it does for hiking, and you value build quality and thoughtful design, the M.U.L.E. 12 should be at the top of your list.
