This product is made of acrylic fiber. Measuring 7.87"" x 8.27"", It is used to keep you warm. The design is very fashionable and it is durable. New novelty gift beanie hat cap with bluetooth, such beanie provides wireless freedom to you,which is a fashionable outdoor product ,designed to remove any inconvenience of using earphones or a headphone for listening to music/take calls outside. It is come with built-in speaker , bluetooth Technology. It not only functions as a beanie but also provides quality sounds at the same time, it is the best choice for the people who love fashion and sports.Nothing makes a better impression than a promotional product with your own logo! Bluetooth 3.0 receiver, listening to music 4 hours, talk for 2.5 hours, standby 10 hours.