100% Soft Acrylic, double knitted beanie, keeps your head warm and allows you to listen to your music without having to wear additional headphones, the Bluetooth stereo headset brings you great sound quality, style, and comfort, perfect for gym, fitness, workout, exercise, outdoor sports such as running, skiing, snowboard, skating, hiking, camping, dog walking, holiday traveling and so on. The control panel built-in stereo speaker and microphone on the left earpiece allows you to skip back and forth through your playlist, answer and hang up calls without having to use your phone.