Icelandic wool is amazing and I'm excited to have this in the assortment! By purchasing this hat, you help UBB remove 1 pound of trash from our oceans and waterways around the world. It's a dual fiber wool which allows it to be highly insulating, water-repellent and breathable. 100% Icelandic Wool; Handmade in Iceland. One Size Only. Available in Cream, Marine Blue, and Heather Green.