The Alto Hat is made of the Swedish-made material Woolly TreemerinoTM, a warm, stretchy and lightweight material with 60% Merino Wool and 40% TENCELTM Lyocell. Merino wool provides natural warmth, while the cellulose-based Tencel fibre gives the material structure and better moisture wicking. Thanks to the functional materials of the Alto Hat for both outdoor sports such as skiing and skating, and for everyday warmth.