Collection: Baselayers

Discover our range of thermal underwear, including heated baselayers and comfortable underpants to keep you warm during all your activities.

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Why a quality baselayer makes all the difference

When preparing for outdoor activities in winter or cold weather — skiing, hiking, trekking, mountaineering — the first layer (the baselayer) is essential. It is in direct contact with the skin: it regulates body temperature, wicks away moisture (sweat) and creates an internal microclimate.

Without a good baselayer, even high-performance outer clothing may be ineffective: cold or moisture can accumulate, affecting comfort, warmth and even health. A good baselayer guarantees warmth, comfort, freedom of movement and performance, while wicking away moisture — preventing hypothermia, chilling, condensation and discomfort.

What Therm-ic baselayers offer

  • Thermal insulation & heat retention — Our baselayers provide consistent warmth thanks to their technical construction: thermoregulating knit, insulating materials, and targeted ventilation. Even in cold weather, you'll stay comfortable without feeling chilly.
  • Moisture management & comfort — The base layer wicks away perspiration to keep the skin dry. This wicking action is essential: it prevents the ‘waterproof + moisture’ effect that cools the body and ensures long-term comfort during prolonged effort or activity.
  • Freedom of movement & tailored fit — Thanks to stretchy materials and ergonomic cuts, Therm-ic baselayers move with the body. Whether you're skiing, hiking, climbing, descending or walking, comfort and mobility are maintained — without any bulk.
  • Versatility depending on use and conditions — Whether you're skiing, hiking, spending a day in the mountains, or simply wearing it in cold city conditions, a Therm-ic baselayer adapts to your needs with either an ‘insulating’ or ‘heating’ version.
  • Essential base in the multi-layer clothing system (layering)— The baselayer forms the basis of the 3-layer system (base layer + midlayer + outer layer): when chosen well, it effectively prepares the body, optimises insulation and moisture wicking — ensuring comfort and performance.

Who are Therm-ic baselayers for?

  • Skiers, hikers, trekkers, mountaineers — anyone who enjoys outdoor activities in cold, snowy, windy or high-altitude conditions.
  • Outdoor enthusiasts, mountaineers, winter sports enthusiasts and winter excursionists — for whom insulation, mobility, comfort and thermal management are essential.
  • Those with cold extremities or sensitive bodies — a high-performance baselayer helps maintain body heat, even in difficult conditions.
  • For users looking for versatile and durable equipment — a single base layer that adapts to multiple uses (skiing, hiking, everyday cold weather).
  • For those who understand the benefits of smart layering — base layer, mid layers, outer layer — to combat the cold without sacrificing comfort or freedom of movement.

Expert advice & best practices

  • Choose the right baselayer for the activity and conditions — for intense activities: opt for a breathable, moisture-wicking baselayer; for extreme cold or long periods of inactivity: choose an insulating or warming version.
  • A fitted layer, not too tight, not too loose—a good fit maximises moisture wicking, insulation and mobility.
  • Don't neglect maintenance—gentle wash, dry flat, avoid fabric softeners or direct heat: this preserves the fibres, technical properties and durability.
  • Combine a baselayer + midlayer + suitable outer layer—for a coherent clothing system: each layer has its role, and together they ensure comfort, warmth, protection and performance.
  • Anticipate moisture and sweat—even in cold weather, physical exertion generates perspiration; a good baselayer allows it to be effectively wicked away to prevent chilling or discomfort.