Men's sweatshirt made of a blend of merino wool and polyester is a great functional piece for wearing all year round in all conditions. Merino is a natural thermal material made of sheep's wool. It is also suitable for allergy sufferers and has a lot of great features. Maintains body temperature. It warms up in winter and cools slightly in summer. It is perfectly breathable. It wicks moisture away from the body perfectly, while thanks to the structure of the fiber, it does not change its insulating properties, so even when wet, it does not get cold. The natural antibacterial property eliminates odor. Please note that Merino is a natural material whose natural phenomenon is pilling, which therefore cannot be a reason for a later complaint about the product.