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