The Fashion and Tech Combine hat features a comfortable stretchable knit material and connects via Bluetooth for hands-free use. It allows you to keep your hands warm while on a call or listening to music. With Bluetooth 5.2 technology, it provides better sound quality, a stable connection, and longer battery life. The hat has two speakers with high-definition stereo sound and noise reduction functions. It has a long working time and is washable. It makes a great gift for both men and women.