Running Bag 555
Record capacity of 24L, two flasks included, and extreme stability for long-distance running. The Running Bag 555 redefines autonomy with its silo-inspired construction, like tanker trucks. Its patented fins ensure a perfect fit, without bouncing, even when loaded with your tent, sleeping bag, and stove. The ideal partner for crossing the GR20 or Mont-Blanc in total autonomy.
- FlaskLock Pocket™
- LowGravity Flask..
- SpineTech™ (555)
- SideDraw™(555)
- FlaskLeash™
- WingsPocket™
- Modular Zipper™ ..
- FlowPocket™
- SecurityPocket™
- Whistle
- BagFoil™
- TankTech™
- SealingPocket™
Check out our size guide for the perfect fit.
If you're between sizes: choose the larger size if you have a V-shaped figure, and the smaller size if you have an A-shaped figure.
30-day free trial.
You have 30 days to put your gear to the test in the field. If you’re not satisfied—even after just one outing—we’ll exchange it or refund your money, free of charge.
Shop with confidence thanks to our certified payment solutions, and tailor your budget to your needs.
With our partner Alma, enjoy interest-free payment plans in 2, 3, or 4 installments. A simple and convenient way to get what you need today without affecting your monthly budget.
Warranty & RepairsWe prioritize durability over replacement. Your gear comes with a 2-year warranty, and we’ll repair your equipment free of charge during the first year in the event of a tear or exceptional wear and tear.Sustainable & Responsible DesignDesigned in France and made in Europe, our products are built to withstand thousands of miles. This eco-friendly approach ensures durable gear that respects your playground while withstanding the most extreme conditions.


- FlaskLock Pocket™
- LowGravity FlaskPocket™(555)
- SpineTech™ (555)
- SideDraw™(555)
- FlaskLeash™
- WingsPocket™
Cette poche permet d'accueillir une flask de 500ml (ou 250ml selon les variantes) de manière intuitive tout en éradiquant les ballotements. Sa matière bi-strech naturellement sous tension, combinée à un élastique siliconé à forte rigidité sur la partie haute plaque fermement la flask contre la ceinture et supprime les oscillations dû à la course à pied . La structure chaine et trame à forte rigidité élastique (Module Elastique apparent de 0,073 N/%) avec allongement maximal de 65% est idéale pour concilier maintien et accessibilité.
Cette technologie brevetée consistant à incliner la poche flask permet de diviser par 4 la sensation de ballottement. En effet, en inclinant la poche d'un angle de 17°, nous augmentons la surface de portage de la poche sur la flasque: le bas mais également le côté soutient la flasque. La contrainte (Force divisé par la Surface d'application) qu'exerce le poids des flasques sur les poches et donc sur la structure du sac est alors divisé par 3. Un modèle par élément fini démontre que le déplacement de la flasque lors de l'impact - et donc la sensation de ballottement - est alors divisé par 4.
Le squelette de ce sac assure un fit physionomique qui s'adapte parfaitement à la morphologie du coureur tout en assurant une incroyable stabilité à haute vitesse, même sac chargé. Pour cela, nous avons développé une matière innovante et exclusive avec notre paternaire Taiana totalement rigide verticalement mais avec une extrême élasticité horizontale. Ainsi, ce squelette apporte un support rigide sur lequel viennent se greffer les poches et limite les effets inertiels des mouvements d'oscillation durant la course tout en permettant une ouverture thoracique maximale et sans contrainte grâce à sa faible élasticité horizontale.
Cette technologie brevetée consiste à ranger et sortir la flasque instantanément par le côté extérieur de la poche, même si les poches avant sont mouillées ou pleines. Le goulot de la flasque se bloque naturellement au niveau de l'ouverture supérieure de la poche afin de maximiser le maintien. La matière bi-strech (allongement maximal de 65%) et l'élastique siliconé sous tension assure la parfaite balance entre stabilité et accessibilité.
This elastic cord placed at the top of the flask pocket provides additional support to the flask neck, even when empty.
In addition to ensuring pack stability, the two large wings can also be used as extra storage in case of heavy loads. Made from a bi stretch woven fabric, these wings naturally press the contents against your back, allowing you to carry two additional flasks or a jacket without bouncing.
The high elasticity of the fabric, with up to 79 percent maximum stretch, provides substantial storage capacity, while the Cordura yarns ensure enhanced durability.
- Modular Zipper™ + Breath Clips (555)
- FlowPocket™
- SecurityPocket™
- Whistle
Notre zip auto-bloquant permet un serrage optimal et uniforme du sac, tout en maximisant le volume des poches avants. Le système autobloquant permet d'ouvrir le sac partiellement et avec précision, notamment lors des phases de montées lorsque le serrage du sac est moins nécessaire et la ventilation plus importante.
Il est complété d'un clip permettant l'ouverture totale du zip, pratique pour maintenir le sac en place en total confort lors des longues phases de montée tout en vous permettant de relancer sans craintes lorsque la pente s'adoucit sur quelques mètres.
Cette grande poche permet de maximiser la capacité de portage à l'avant du sac pour rendre l'intégralité de votre nutrition et de vos accessoires de course facilement accessibles et sans ballotements y compris en situation de grande fatigue ou de perte de lucidité. Grâce se matière, cette poche bénéficit d'une capacité d'allongement maximal exceptionnelle de 80%, lui permettant de quasiment doubler de volume et de faciliter l'accès à son contenu grâce à un contrôle visuel. Son importante rigidité élastique (Module Elastique apparent de 0,125 N/%) lui permet également de plaquer et maintenir en place le matériel stocké.
This front zip pocket allows you to safely carry your phone, keys, or nutrition without any bouncing. In addition to increasing front storage capacity, this pocket, made from a bi stretch woven fabric, ensures excellent stability of its contents.
Its high elasticity, with up to 80 percent maximum stretch, combined with strong elastic recovery, keeps items firmly pressed against the pack structure and reduces the inertial effects of running.
This safety whistle complies with the mandatory equipment requirements of the world’s leading ultra trail races.
- BagFoil™
- TankTech™
- SealingPocket™
This patented technology features a system of upper and lower cross fins designed to eliminate bouncing during running, even under heavy loads. The rigid upper fins provide the necessary support to limit the inertial effects of movement, while the elastic lower fins secure the load firmly against the runner’s back.
As a result, the pack’s weight stays close to the runner’s center of gravity and moves as one with the body, eliminating any asynchronous motion between the two. In cases of heavy loads, the lower fins can also help increase the carrying capacity.
This patented back pocket features multiple compartments, each attached to the structure of the pack, allowing you to organize and separate your gear. In addition to improving storage clarity, this compartmentalized system distributes the load and reduces the movement of the contents.
Inspired by the construction of tanker trucks, this technology evenly spreads the weight across each compartment, maximizing the load bearing surface of the pack structure. As a result, localized pressure is reduced and the inertial effects of pack movement during running are significantly minimized.
Made from EvenSafe 3L™, this waterproof pocket positioned inside the large back pocket is ideal for safely carrying personal items such as your credit card, passport, or charger. Directly attached to the structured part of the pack, it remains highly stable even when fully loaded. Its waterproof fabric protects your belongings from moisture.
HOW TO PACK YOUR 555 RUNNING BAG
The mattress (folded into quarters), the compacted sleeping bag, the emergency blanket, and the Jetboil are then stowed in their designated pockets to keep the load compact, stable, and easily accessible. The tent is placed inside the main compartment without its stuff sack to help organize the space.
The Running Bag 555 is designed for lightweight backpacking, long-distance trail running, and self-supported adventures. To make the most of its 24L capacity, opt for ultra-compact camping gear: a lightweight tent such as the MSR FreeLite, Samaya Instant 2, or equivalent; a compressible sleeping bag; a lightweight sleeping pad; a waterproof jacket; a headlamp; a portable charger; water; snacks; and a safety kit. The goal: to carry the essentials for several days without compromising stability while on the move.
A trail running pack designed for ultra-distance and multi-day adventures
Which trail running pack should I choose?
Running Bag 555
- FlaskLock Pocket™
- LowGravity Flask..
- SpineTech™ (555)
- SideDraw™(555)
- FlaskLeash™
- WingsPocket™
- Modular Zipper™ ..
- FlowPocket™
- SecurityPocket™
- Whistle
- BagFoil™
- TankTech™
- SealingPocket™
Running Bag 333
- SideDraw™
- LowGravity Flask..
- FlaskLock Pocket..
- SpineTech™
- FlaskLeash™
- Modular Zipper™ ..
- FlowPocket™
- CrossLock Pocket..
- Whistle
- Outstretch™
- Dual Reach Tunnel™
- QuiverNest™ (bag)
- InterScap Pocket™
- Spine Pocket™
- SafetyPockets™
- SideDraw™
- LowGravity FlaskPocket™
- FlaskLock Pocket™ (Bag)
- SpineTech™
- FlaskLeash™
This patented technology allows you to store and retrieve the flask instantly from the outer side of the pocket, even when the front pockets are wet or full. The flask neck naturally locks at the upper opening of the pocket to ensure maximum support.
The bi stretch fabric, with up to 65 percent maximum stretch, combined with a tensioned silicone elastic, provides the perfect balance between stability and accessibility.
This patented technology, based on an angled flask pocket, reduces the sensation of bouncing by a factor of four. By tilting the pocket at a 17 degree angle, the contact surface between the pocket and the flask is increased, with both the bottom and the side supporting the flask.
As a result, the stress, defined as force divided by the contact area, exerted by the weight of the flasks on the pockets and the pack structure is reduced by a factor of three. Finite element modeling shows that the movement of the flask during impact, and therefore the sensation of bouncing, is reduced by a factor of four.
Inspired by the pockets of our shorts, this one allows you to carry a 500 ml flask at the back of the pack while eliminating any bouncing. Its naturally tensioned bi stretch fabric, combined with a high rigidity silicone elastic at the top, firmly secures the flask against the back and prevents movement during running.
The woven structure, with strong elastic rigidity, an apparent elastic modulus of 0.073 N per percent, and up to 65 percent maximum stretch, offers the perfect balance between support and accessibility.
The structure of this pack provides an anatomical fit that adapts perfectly to the runner’s body while ensuring outstanding stability at high speed, even when fully loaded.
To achieve this, we developed an innovative and exclusive fabric with our partner Taiana, designed to be fully rigid vertically while offering extreme horizontal elasticity. This structure creates a stable framework on which the pockets are built, reducing the inertial effects of movement during running, while allowing maximum chest expansion without restriction thanks to its horizontal flexibility.
This elastic cord placed at the top of the flask pocket provides additional support to the flask neck, even when empty.
- Modular Zipper™ + Breath Clips
- FlowPocket™
- CrossLock Pocket™ (bag)
- Whistle
Our self locking zip ensures optimal and even tightening of the pack while maximizing the volume of the front pockets. The self locking system allows for precise partial opening, especially during climbs when less compression is needed and ventilation becomes more important.
It is complemented by a clip that enables full opening of the zip, providing added comfort during long ascents while keeping the pack securely in place, and allowing you to pick up the pace again with confidence when the gradient eases.
This large pocket maximizes front storage capacity, making all your nutrition and running essentials easily accessible without bouncing, even in situations of fatigue or reduced awareness.
Thanks to its fabric, it offers exceptional stretch capacity, with up to 80 percent maximum elongation, allowing it to nearly double in volume while enabling easy visual access to its contents. Its strong elastic rigidity, with an apparent elastic modulus of 0.125 N per percent, also helps keep stored items firmly in place.
This 50 ml pocket allows you to securely store your keys or earphones while eliminating any bouncing. Its reverse cross closure combined with a bi stretch fabric ensures intuitive access to the contents.
The high elasticity of the pocket, with up to 80 percent maximum stretch, allows it to perfectly adapt to the shape of the items, while its elastic rigidity, with an apparent elastic modulus of 0.125 N per percent, provides support and stability.
This safety whistle complies with the mandatory equipment requirements of the world’s leading ultra trail races.
- Outstretch™
- Dual Reach Tunnel™
- QuiverNest™ (bag)
- InterScap Pocket™
- Spine Pocket™
- SafetyPockets™
The Outstretch™ technology used in our pack firmly secures the items stored in the pockets, whether empty or full, eliminating any bouncing. It also ensures that the pack expands outward as it is filled, maintaining optimal comfort regardless of the load.
Thanks to a combination of materials with carefully calibrated stretch and elastic modulus, along with the integration of gussets, Outstretch™ allows the pockets to adapt to the shape of their contents while minimizing the inertial effects of running.
Thanks to its grab guide accessible from the front of the pack, this tunnel pocket is ideal for storing your waterproof jacket while keeping it within easy reach. Its large gusset combined with a tensioned elastic finish allows you to securely store up to two jackets.
Strategically placed attachment points at the runner’s shoulder ensure secure fixation of the quiver, while the central loop accommodates the quiver’s tightening system. Whether positioned vertically or at an angle, the quiver remains at the right height and the pole tightening system stays easily accessible.
Located in the scapular mobility zone, this back pocket is designed to stop at mid back, ensuring easy access to its contents while running. It easily accommodates essential accessories such as a headlamp, cap, neck gaiter, sunglasses, extra nutrition, or a jacket. Its tensioned binding combined with a gusset allows it to adapt to the size of stored items while keeping them secure.
This is the only pocket that cannot be accessed while running, and is therefore intended for storing safety items rather than essentials needed during activity, such as a spare set of clothing.
Thanks to its reverse cross opening and elastic fabric, this small secure pocket is ideal for safely storing keys or a credit card. The high elasticity of the material allows the pocket to adapt to the shape of the items, while its strong elastic recovery keeps the contents firmly pressed against the pack structure to reduce movement.
EVERY DETAIL IS DESIGNED FOR ULTRA DISTANCE, TO FACILITATE YOUR PROGRESSION, EVEN IN SITUATIONS OF LOSS OF LUCIDITY
FAQs - Running Bag 555
The Running Bag 555 is designed for lightweight backpacking and ultra-distance trail running. We recommend using ultra-compact camping gear, such as a lightweight tent like the MSR FreeLite, Samaya Instant 2, or equivalent. Add a compressible sleeping bag, a lightweight sleeping pad, a waterproof jacket, a headlamp, a power bank, water, snacks, and a safety kit to set out for several days of trail running, fast hiking, or self-supported traverses.
The Running Bag 555 is designed for backpacking and self-supported adventures. With a 24-liter capacity and enhanced stability, it lets you carry everything you need for several days: a tent, sleeping bag, stove, clothing, water, and food. It’s ideal for cross-country treks, long-distance hikes, and challenging projects like the GR20, the Tour du Mont-Blanc, or fast hiking.
The choice of your Wise trail bag depends on the distance, the level of autonomy, and the type of terrain you will be facing.
- Running Bag 331 (6L): ideal for fast trails and minimalist ultras. Ultra-light, breathable, and bounce-free, it allows you to carry essentials while maintaining maximum freedom of movement. Its angled flasks facilitate hydration on the run.
- Running Bag 333 (12L): the most versatile trail bag. Perfect for technical ultras requiring mandatory gear, it offers quick access to your equipment without removing the bag. Stability, lightness, and practicality make it a reliable ally for long distances.
- Running Bag 555 (24L): designed for ultra-trail with total autonomy and bivouac. Its large capacity and innovative structure allow you to carry all your equipment (tent, sleeping bag, food) without compromising stability. Ideal for challenging adventures like the GR20.
Maintaining a trail running vest or pack is essential to preserve its performance, breathability, and durability, especially after long runs or ultras.
To properly wash a trail running pack or vest, two options are possible:
Machine wash
- Use a delicate or synthetic program at 30°C
- Choose a low spin cycle (few revolutions/minute)
- Opt for liquid detergent without harsh chemicals
- Absolutely avoid fabric softener, which damages technical fibers
Hand wash (ideal for extending lifespan)
- Use lukewarm water with mild soap
- Gently clean perspiration zones (back, straps)
- Rinse thoroughly without twisting the pack
- Hand washing is particularly recommended for maintaining a technical trail running pack and preserving its elasticity and support.
Drying
- Let your pack air dry
- Avoid tumble dryers and direct heat sources
Flask maintenance (hygiene tip)
To prevent bacteria and bad odors:
- Carefully clean your flasks after use
- Let them dry completely
- You can then place them in the freezer once clean, a simple and effective method to limit bacterial growth
This tip is particularly useful for trail running pack flasks used in ultras, where hygiene is essential.
To choose the right size Wise trail vest, it's essential to base your decision on your chest measurement and body type to ensure optimal support without bouncing.
Measure your chest circumference (at the level of your pectoral muscles) then refer to the sizes:
S1: approximately 76–85 cm
S2: approximately 82–91 cm
S3: approximately 88–96 cm
S4: approximately 93–101 cm
S5: approximately 98–106 cm
S6: approximately 103 and above
A well-fitting trail vest should be:
- Close to the body without excessive compression
- Stable, without bouncing when running
- Comfortable even when loaded on long distances
How to choose between two sizes?
If you are hesitating between two trail vest sizes:
- V-shaped body (broad shoulders) → take the next size up
- A-shaped body (slimmer torso) → take the next size down
This optimizes support and prevents chafing during your runs.
Free delivery on all orders over 100€
We give you 30 days to try your product. If it doesn't suit you, we'll take it back.
Réparez votre produit gratuitement. Valable jusqu'à 1 an après l'achat.
En cas d'erreur de taille, nous effectuons le changement sous 48h.