The mountains offer a demanding and varied environment that demands meticulous preparation, particularly in terms of equipment. For athletes and outdoor enthusiasts, the choice of technical underwear is a crucial basis for guaranteeing comfort and performance in all conditions. This guide explores the essential criteria to consider when selecting the right technical underwear for various mountain activities such as mountaineering, skiing and hiking. Find out more about our best technical underwear and other technical clothing.

1. Understanding technical underwear

Technical underwear is designed to fulfill several specific functions: thermal regulation, moisture management, comfort, and sometimes UV protection or antibacterial properties. They are distinguished from ordinary underwear by advanced materials and specific technologies.

Materials used :

  • Synthetics (polyester, polyamide): Excellent moisture wicking, quick drying, durable.
  • Natural (merino wool): Excellent thermal regulation, naturally odor-resistant, very soft to the touch.
  • Material blends: Combine the advantages of synthetic and natural fibers.

2. Selection by activity

The choice of technical undergarments must be adapted to the intended activity and climatic conditions.

For mountaineering and climbing:

Opt for undergarments that offer excellent thermal regulation and good freedom of movement. Merino wool is particularly suitable for these activities, as it maintains a stable body temperature while being breathable. In the high mountains, where the weather can change rapidly, the ability of your underwear to keep you dry and warm is vital.

For skiing or snowboarding:

Layering is crucial. Start with a moisture-wicking base layer in synthetic or merino. This should be complemented by an insulating mid-layer and a waterproof outer layer. The cut of the underwear should be snug enough to retain body heat, but flexible enough not to restrict movement.

For hiking:

Breathability and the ability to dry quickly are paramount, especially when hiking in wet or highly changeable environments. Synthetic fibers are often preferred for their lightness and ease of drying.

3. Additional selection criteria

Comfort and fit:

Comfort is essential when choosing your technical underwear. They should be free of irritating seams and have minimal chafing. Good elasticity is also important to ensure optimum freedom of movement.

Technical properties :

  • Anti-odour: Important for long excursions where washing facilities are limited.
  • UV protection: A plus for high-altitude activities where exposure to the sun is more intense.
  • Compression: Some undergarments offer compression zones to aid blood circulation and muscle recovery.


Technical underwear is not just a question of comfort, but a key element of your mountain gear, contributing to your performance and safety. Choose according to your activity, expected climatic conditions and the technical specifications on offer. With the right underwear, you're ready to take on the mountains in the best possible conditions.

By following these tips, you'll be able to choose technical underwear that meets your specific needs and significantly increases your comfort and efficiency during your mountain adventures.


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