The Sensor Bold 220g men's long-sleeve shirt is the perfect choice for all winter and transitional outdoor activities when you need reliable warmth and uncompromising comfort. It is crafted from premium-quality 100% natural merino wool, with ultra-fine fibers of just 16.5 microns ensuring incredible softness and a pleasant next-to-skin feel without any itching or scratching. With a substantial fabric weight of 220 g/m² and a total weight of only around 220 g, it offers optimal thermal insulation, making it excellent both as a standalone base layer directly against the skin and as a warmer mid-layer.

Thanks to the outstanding natural properties of merino wool, this shirt regulates body temperature with ease—keeping you reliably warm in cold conditions and preventing overheating during intense exertion, while retaining its insulating ability even when damp. The knit fabric delivers high breathability, rapid moisture wicking, and natural sun protection with UPF 25+. Merino wool's inherent antibacterial properties inhibit bacterial growth and odor buildup, keeping the shirt fresh even after multiple days of continuous wear on multi-day treks and ski tours.

An anatomical, close-fitting cut combined with enhanced fabric elasticity ensures complete freedom of movement during any athletic pursuit. Premium comfort is guaranteed by flatlock seams, which effectively eliminate the risk of chafing or pressure points beneath heavy backpack shoulder straps. Ethical, ecological, and sustainable production is certified by reputable standards including WOOLMARK, RWS (Responsible Wool Standard), and OEKO-TEX, making the Sensor Bold a reliable, eco-friendly choice for hiking, mountaineering, cross-country skiing, and downhill skiing.