The Sensor Merino Double Face men's long-sleeve shirt is a technically sophisticated base layer designed for uncompromising comfort and thermal regulation across diverse cold-weather sports activities. It is built on an innovative two-layer knit combining natural New Zealand merino wool on the outside and a soft synthetic material on the inside. Thanks to this well-thought-out double-layer construction, the inner side wicks sweat away from the skin extremely fast without irritating sensitive skin, while the outer wool provides reliable insulation and naturally prevents unpleasant odors.

An optimal balance between breathability, durability, and thermal protection is ensured by a fabric density of 170 g/m² and a precisely balanced composition of 60% merino wool and 40% polyester. With a total weight of only around 180 g, the shirt offers an exceptional warmth-to-weight ratio, while the wool retains its insulating properties even when damp. In addition, the fabric provides reliable sun protection with a UV factor of UPF 25, which is essential for activities under the high-altitude sun.

An anatomical, body-hugging cut with an extended back reliably shields the sensitive lumbar area from cold drafts during intense movement or when wearing a climbing harness or backpack. Flatlock seams ensure complete chafe-free comfort under additional layers of clothing. The Sensor Merino Double Face is the perfect choice for ski touring, mountaineering, winter running, or cycling—wherever you need premium functional underwear for all-day outdoor comfort.