Compressport 3D Thermo Merino Long Sleeve Base Layer

When the winter frost sets in, maintaining your training volume requires gear that works as hard as you do. The Compressport 3D Thermo Merino Base Layer is specifically designed for the demands of endurance athletes pushing through tough seasonal sessions. By combining the exceptional, natural thermoregulation of high-quality merino wool with the durability and fast-drying performance of polyamide, this premium long-sleeve top keeps you warm without the risk of overheating. Its seamless construction eliminates chafing, allowing you to focus on your stride and transition work rather than uncomfortable gear distractions.

What truly sets this winter base layer apart is its intelligent, high-performance design. Featuring body-mapped 3D knit zones across the chest and arms, it traps a layer of insulating air where you need it most, while integrated mesh ventilation panels under the arms and along the spine rapidly wick away sweat. For high-intensity intervals or unpredictable weather, the practical half-zip with a protective flap and ergonomic collar allows you to adjust your temperature on the move. It’s the ultimate investment in comfort and consistency, ensuring your winter base miles pave the way for a successful race season.