- grey FABRICS: 70% Acrylic/30% Wool. Unique design keeps you warm and looking good in the cold weather! STRETCHY SIZE:Our hat is made of stretchy acrylic to fit any size, not too loose or tight. WHEN TO WEAR: A great outdoor beanie during the colder months, especially when it¡¯s brutal outside. It will keep your head and ears warm during outdoor activities including a football game, ice skating, snowboarding, skiing, hiking, and walking the dog.