Material: Premium quality stretchy, thermal spun acrylic. The inner is made of artificial wool. Very soft and cozy, hand-knitted feel, close to the skin, giving you lasting warmth and softness. Made of thick and comfortable acrylic knit, comfortable and warm. Soft fleece lining, has better heat retention, enjoy the maximum warmth. Size Reference: Hat Circumference: 22"-23.6", Height: 10.2"; Circle Scarf Circumference: 19.7"-27.6", Height: 8.7". One size fit most. This hat can be stretched