The Mountain Warehouse Men's Asgard III Merino Wool Thermal Top is crafted with a blend of 80% Merino Wool and 20% Polyester, offering exceptional performance in cold weather conditions. This top boasts a plain design for a sleek look, featuring a half-zip fastening for added versatility. The high-neck offers extra warmth, while the long sleeves provide full coverage. This thermal top is equipped with advanced fabric technology that includes anti-bacterial properties and heavyweight construction to keep you feeling fresh and warm throughout your activities. Thumb holes are included for additional cold protection. Sizing ranges from XXS (33 inches) up to 4XL (56 inches).