When you hit the trails, hydration becomes a top priority. Whether it’s a quick training session or an ultra-trail race, having a proper hydration pack is essential for performance and avoiding heat exhaustion. But with so many models available, how do you choose the right one? Capacity, comfort, carrying system… Follow our guide to find the pack that will support all your trail adventures!
1. Define your primary use
First, ask yourself: what activity do you do the most?
2. Choose the right capacity
The capacity of your pack depends on the duration of your effort:
Short outings (less than 2 hours): A trail pack of 5 liters or less is generally sufficient. Our Ultralight 5L Made In France is ideal for this type of session.
Medium outings (2 to 5 hours): Opt for a pack of 5 to 12 liters to carry a bit more gear and fuel. At Raidlight, we have several models to offer:
- Responsiv Trail Pack 8L - 250g
Key features: 9 pockets for effective storage of essentials.
Lightweight and comfortable design.
Ergonomic fit for optimal stability.
- Dynamic Trail Pack 10L - 200g
Key features: Integrated quiver for quick access to poles.
Waterproof front pocket to protect your phone.
Compression system to stabilize the load.
- Ultralight Trail Pack 12L Made In France - 190g
Key features: Made in France.
Ultra-light and comfortable, suitable for long distances.
Multiple zippered pockets for optimal organization.
Micrometric tightening system for a precise fit.
- Responsiv Trail Pack 15L - 265g
Key features: Micrometric tightening system for a custom fit.
10 strategically placed pockets.
Ergonomic design to match runner's anatomy.
Ultra-trail or multi-day trek: Choose a pack of 10 to 24 liters, or more if you're setting out for multiple days. At Raidlight, we have these models for you:
Raidlight Ultralight 24-30L – 330g
Key features: Made in France.
FreeLock tightening system for precise adjustment.
6 pockets including 3 zippered and 3 expandable for efficient gear storage.
Key features: Ideal for stage races and self-supported adventures.
Large 22L back pocket.
Three adjustable front straps for a personalized fit.
Raidlight Adventure 40L – 990g
Key features: Comfortable and lightweight for long distances.
9 pockets for optimal organization.
Ergonomic design with mesh shoulder straps.
Raidlight Raid Legend 32L – 700g
Key features: Designed for stage races and demanding ultra-trails.
12 pockets, including 6 secure zippered compartments.
Foam and mesh back panel and straps provide great ventilation.
3. Check the hydration system
There are several options:
- Hydration bladder: great for drinking without stopping.
- Soft flasks: easy to refill and clean, perfect for quick aid stations.
4. Ensure comfort and fit
A good hydration pack should be stable, breathable, and ergonomic:
- Look for adjustable shoulder straps and mesh fabric for ventilation.
- Prefer body-hugging packs to avoid annoying bouncing.
- Try multiple sizes if possible, especially for technical models.
5. Don’t overlook storage options
Even if hydration is your priority, you'll likely need space for:
- Your smartphone
- Your keys
- Your rain jacket
- Nutrition (bars, gels)
Choosing the right hydration pack ensures you enjoy your outings without worrying about thirst. Think about your activity type, duration, and most importantly—your comfort! And always test your pack in real conditions before a big race or important outing.
Check out our other articles:
How to prepare your 12L pack for UTMB®, Diagonale des Fous® or UT4M®?
What to pack in your trail running backpack for a long outing?
