Made of 100% Acrylic One size fits most Insulated for extra warmth Comfortable Soft to the touch Great for keeping warm in the cold This thermal hat is a great item to have while outdoors in the cold. It is insulated for extra warmth and is comfortable to wear all day. This hat is also soft to the touch and is lightweight. This is great to use when working outdoors in the cold or for being outdoors for a long period of time.