Our Amnicon Hat is made from a double layer of Polartec® Power Wool™. Unlike most blended fabrics, Power Wool™ utilizes a bi-component knit that places separate wool and polyester threads where they can be most effective. Consequently, it is a light and stable fabric with a durable polyester exterior and a soft and odor-resistant merino interior grid. This unique integration of synthetic and natural fibers allows us to make a best-of-both-worlds hat: durable, stable, warm and odor resistant.