When it comes to mountain activities such as trail running, ultramarathons or even fast hiking, staying well hydrated is crucial. A hydration vest is therefore an essential piece of equipment for maintaining good hydration without compromising performance or comfort. This detailed guide will help you choose the hydration vest best suited to your specific needs, taking into account a number of technical and practical criteria. See our best hydration vests and other trail equipment.

1. Hydration capacity and management

The reservoir capacity of a hydration vest is one of the first criteria to consider. Capacities generally range from 1.5 liters to over 10 liters, including both the water reservoir and storage space for gear. For short races or training sessions lasting a few hours, a tank of 1.5 to 2 liters may be sufficient. On the other hand, for ultramarathons or multi-day treks, opt for models that can hold more than 5 liters of water, as well as food, a change of clothes and safety equipment.

It's also important to consider the type of hydration system. Some vests offer water pouches with a tube, allowing you to drink without having to handle bottles, while others are equipped with flexible flasks placed at the front for quick and easy access. The choice may depend on your personal preferences and the type of activity envisaged.

2. Comfort and fit

Comfort is essential, especially when you plan to wear the vest for several hours on the move. A good hydration vest should be adjustable to fit your body perfectly without causing chafing or irritation. Materials should be breathable to prevent sweat build-up and allow good ventilation. Look for models with wide, padded shoulder straps and back panels designed to minimize pressure on the back and shoulders.

Fit is also crucial to prevent the vest from ballooning during the run, which could affect your balance and increase fatigue. Make sure the vest remains stable even when the tank is full. Some models offer side or chest adjustment systems for maximum customization of fit.

3. Technical features and accessories

Modern hydration vests are packed with features that can enhance the mountain experience. Here are some features to look for:

  • Multiple pockets: useful for organizing and quickly accessing small equipment such as energy bars, phone, headlamp, survival blanket, etc.
  • Safety whistle: often integrated for emergency situations.
  • Compatibility with additional hydration systems: some vests allow you to add additional flasks or reservoirs.
  • Rain cover: to protect your gear in inclement weather.
  • Reflective elements: for better visibility during early-morning or late-night activities.


Choosing the right hydration vest for mountain and high-performance activities depends on many factors, from water storage capacity to design quality and comfort. It's essential to consider the intensity and duration of your activity to make an informed choice. A well-chosen vest can make a significant difference to your ability to perform and enjoy your outdoor adventures. Take the time to try on different models and make careful adjustments to ensure that your vest perfectly meets your expectations.


  • Free delivery
    from 119 € (* see conditions)

    Delivery methods

  • Secure payment
    CB, Paypal, Scalapay, Bank transfer

    Payment methods Payment methods

  • Customer service
    by phone on +33 (0)9 72 306 150
    by email

##|--OK--|##
Need help ?