The Meralp men's hat is a great functional piece made of high-quality material with an admixture of merino wool, which will protect you from the cold and wind. Merino is a natural material suitable for allergy sufferers with a lot of great properties. Properties: Maintains body temperature It is perfectly breathable Perfectly wicks moisture away from the body Natural antibacterial property eliminates odours Excellent thermal insulation Elastic Please note that Merino is a natural material whose completely natural phenomenon is pilling, which therefore cannot be a reason for a later complaint about the product.