The t-shirt is the base layer of your hiking kit: it must wick moisture, dry fast, and eliminate chafing. Whether made from natural or synthetic fibres, here is a curated selection of 10 field-tested, proven Cimalp models.
1. Most natural: CLAPIER
Who is it for? Trekkers and travellers who want to wear the same layer for days on end without odours. Made with 47% merino wool, the CLAPIER is the ultimate multi-day trail t-shirt. Merino wool naturally regulates body temperature and offers exceptional antibacterial properties.
- Key strength: Outstanding thermal comfort (cool in summer, warm in winter) and zero odours, even after several days on the trail.
- Best for: Trekking, travel, hiking.
2. Most breathable: BAUGES
Who is it for? High-intensity athletes performing in hot weather. This t-shirt combines CIMAFRESH® technology—a silver-ion treatment that curbs odours—with an ultra-lightweight fabric. Built to maximise airflow.
- Key strength: Featherweight build with instant moisture-wicking power. You will barely feel it on your skin.
- Best for: Trail running, fast-hiking, summer treks.
3. Most iconic: LE FRENCH
Who is it for? Those who want technical performance with true Cimalp heritage. Made from an ultra-lightweight, packable fabric, it delivers top-tier drying performance (CIMADRY® technology).
- Key strength: A clean, stylish cut with zero compromises on breathability and lightness.
- Best for: Hiking, multi-sport, travel.
4. Most insulating: ALBAN
Who is it for? Active hikers looking for a breathable long-sleeve top. The ALBAN t-shirt delivers lightweight thermal protection. Its technical structure traps an insulating layer of air while actively wicking moisture.
- Key strength: Its ability to regulate body temperature during stop-and-go activities. It dries fast and never clings to the skin.
- Best for: Nordic walking, active spring/autumn hiking.
5. Most natural (long-sleeve): CHARVIN
Who is it for? Merino enthusiasts looking for protection on chilly mornings or at higher altitudes. This is the long-sleeve edition of the Clapier. Made from 100% merino wool, it creates a natural shield against UV rays and cold wind without overheating.
- Key strength: The versatility of a natural long-sleeve top. It works as a thermal base layer or a standalone layer depending on the season.
- Best for: Mountaineering, mid-season hiking, high-altitude trekking.
6. Most technical: FARAUT
Who is it for? Outdoor enthusiasts who like to regulate their ventilation on the go. The FARAUT features a half-zip neck. Essential on the mountain: unzip during steep ascents for maximum airflow, and zip it up at the summit to protect your neck from the wind.
- Key strength: The versatility of a zip neck paired with a stretch technical fabric that moves with your body.
- Best for: Technical hiking, trail, cycling.
7. Highest performance: EIGER
Who is it for? The dedicated hiker who wants the best in Cimalp synthetic performance. A flagship piece in the hiking line, the EIGER features CIMAFRESH® fibres for lasting freshness. Its cut is tailored to eliminate chafing under rucksack straps.
- Key strength: Exceptional durability and an ultra-soft touch similar to cotton, packed with the performance of high-end synthetics.
- Best for: Day hiking, fast and demanding hikes.
8. Most versatile: VENTURI
Who is it for? All-round outdoor athletes seeking an effective, high-value t-shirt. Featuring CIMADRY® technology, the VENTURI is the ultimate multi-sport t-shirt. It wicks moisture 4 times faster than a standard t-shirt and dries in no time.
- Key strength: Simple and effective. The go-anywhere t-shirt, from workout sessions to mountain trails.
- Best for: Multi-sport, travel, light hiking.
9. Most insulating (zip version): ARGENTIERES
Who is it for? Athletes looking for performance and muscle support. This zip-neck thermal jersey is built for high-intensity efforts in cool conditions. Its closer fit ensures optimal moisture management right next to the skin.
- Key strength: Advanced technical design. The zip allows precise thermal regulation while the fabric delivers record-breaking moisture transfer.
- Best for: Winter trail running, run-hiking, cross-country skiing.
10. Most stylish: MAP
Who is it for? For post-hike downtime, travel, or everyday mountain lifestyle. Made with a Cotton/Polyester blend, the MAP t-shirt delivers the natural comfort of cotton combined with the durability and fast drying of synthetics. Graphic print inspired by topographic hiking maps.
- Key strength: Casual styling and outstanding comfort. Perfect for relaxing at basecamp or everyday wear while showing your passion for the outdoors.
- Best for: Lifestyle, travel, light hiking.
Merino or Synthetic: how to choose?
Choosing the right hiking t-shirt comes down to balancing odour control with drying speed. Here is everything you need to make the right choice.
Merino Wool: the go-to for long treks
Merino (featured in the CLAPIER) is a natural fibre boasting ideal properties for hikers.
- Key strengths: It does not retain odours (wear the t-shirt multiple days in a row) and naturally balances temperature (keeps you warm when it is cold, cool when it heats up).
- Who is it for? Multi-day trekkers, lightweight travellers, and anyone who values natural next-to-skin comfort.
Synthetic fibres: maximum breathability
Technical polyester is built for active performance.
- Key strengths: Record moisture transfer and ultra-fast drying. These fibres do not absorb water: sweat is pushed outwards to keep you dry through exertion. They also withstand pack friction over long distances.
- Who is it for? High-intensity athletes, trail runners, and day hikers tackling hot conditions.
3. Anti-odour technologies (CIMAFRESH®)
If you opt for synthetics but worry about body odour, choose models equipped with CIMAFRESH® technology. Powered by a silver-ion treatment, it stops odour-causing bacteria from multiplying, delivering the ideal compromise between synthetic quick-drying performance and merino freshness.
Photo credits: Delphine Danielou
