Our essentials for carrying your gear on the trail
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Why is the trail running pack crucial in trail running?
In trail running, your pack is not an accessory. It’s your ally to reach the finish. A pack that bounces at the 40th kilometer, straps that cut into your shoulders, pockets that are inaccessible while running: a single weak link, and it’s abandonment.
For over 25 years, we have tested our packs in the most extreme conditions: UTMB, Marathon des Sables, Diagonale des Fous. 190 grams for 12 liters. Micrometric Freelock system. Trail running forgives nothing. Neither does your pack.
How to choose your trail running backpack?
I am doing a short trail run
ULTRALIGHT 5L
This 5L ultra-light trail running backpack (120g) combines functionality, comfort, and durability for optimal performance on all terrains.
I am looking for a versatile vest
ULTRALIGHT 12L
The ULTRALIGHT 12L bag accompanies you on all distances, from short trail runs to ultras.
I'm starting an ultra
ULTRALIGHT 24-30L
Our flagship model for stage races and desert adventures with an Ultralight weight: 330g.
Find all our detailed advice in the article below:
The 5 criteria that make the difference
Ultra-lightweight
Stability
Breathability
Practicality
Made in France

Exclusive innovation
The perfect fit with micrometric buckles
The problem with traditional backpacks: either too tight (chest compression) or too loose (bouncing). The system solves this dilemma with lateral micrometric buckles that adjust the pack in real time.
How does it work? Two micrometric buckles on the sides allow you to adjust the pack’s width to your body shape and its contents. Empty or full pack, narrow or wide chest: the micrometric buckles adapt in 3 seconds.
Result: absolute stability, zero bouncing, long-lasting comfort. The pack becomes an extension of your body.
Our ultra-versatile trail vests
A selection of versatile vests, from 8 to 15L, designed to accompany you everywhere.
Quick outings, ultra-technical or long training sessions: these models cover all terrains and all profiles.
Adjusted volume, long-lasting comfort, stability even when loaded, choose the one that fits your practice, not the other way around.
All our trail bags and vests
View allFrequently Asked Questions
What is the difference between ULTRALIGHT 12L and RESPONSIV 15L?
What is the difference between ULTRALIGHT 12L and RESPONSIV 15L?
The ULTRALIGHT 12L and RESPONSIV 15L are two trail vests designed for long outings and ultra-trail, with a different approach depending on the level of self-sufficiency and the priority given to weight.
The ULTRALIGHT 12L is a vest Made in France, developed with a focus on lightness and minimalism. It is aimed at runners who seek a very close-fitting, comfortable, and stable pack, with a micrometric tightening system allowing precise adjustment. Its controlled volume makes it a suitable solution for ultra-trail and long outings when gear is optimized.
The RESPONSIV 15L offers a larger volume and an organization designed to carry more equipment. It is better suited for long outings with greater self-sufficiency, demanding formats, or runners needing extra capacity, while maintaining good stability during the run.
The choice between the two mainly depends on the needed volume, the level of self-sufficiency sought, but also on the priority given to lightness and Made in France.
Is the Freelock system really effective?
Is the Freelock system really effective?
Yes. Side micrometric buckles = precise adjustment in 3 seconds. Zero bouncing confirmed by all testers.
Are the hydratation pack suitable for women?
Are the hydratation pack suitable for women?
Yes. Raidlight trail vests are designed to fit different body shapes thanks to precise width and tension adjustments, notably through the micrometric tightening system. Some models also come in women-specific versions, with a cut tailored to the female chest to improve comfort, support, and stability during running.
The size guide and product sheets make it easy to identify the model and fit best suited to your body shape.
Can we use a hydration bladder?
Can we use a hydration bladder?
Yes. All our bags and vests are designed to be compatible with a dedicated hydration system. Our hydration vests and large capacity bags come with two soft flasks or a rigid bottle, depending on the models. They also have a back compartment compatible with a water bladder, if you prefer this setup, except for the Ultralight 5L. The goal is simple: to allow you to adjust your hydration to your distance, the weather conditions, and your running style, without constraint.
How to store the poles?
How to store the poles?
Raidlight trail vests include various carrying systems for poles, depending on the model. It is possible to attach them at the back or front of the pack, allowing for quick storage when not in use, while keeping them easily within reach.
The Dynamic 10L notably features a pole holder directly sewn onto the outer back pocket, enabling simple and effective storage during the run. Furthermore, all Raidlight vests are compatible with a quiver for trail poles, offering an additional solution for quick and stable carrying.
All these systems are designed to allow stowing and deploying the poles without removing the pack, so you can stay smooth and focused on the run.

