Willa Beanies are all made out of 100% Bluesign approved merino wool with the best available Schoeller yarns and are handcrafted in Europe. Subzero Beanies are warm enough for the coldest possible conditions. They include an anti-itch head band for those who are sensitive even to the finest merino wool. The head band is made of Polycolon yarn (a technical highly breathable and light yarn). On top of being itch free it also ensures that moisture is transferred to the outer Merino Wool. The wool has the wonderful effect of insulating well even when wet. One size fits most heads.