It seems that the hat can listen to music, possibly as a stereo. The material for the cap is 100% polyester wool, providing insulation and resistance. And it has many colors, which are neutral and can be used by both men and women. The special thing is that it conforms to the IPOD. Nanotechnology. At present, there is no domestic website to introduce him, so there is no place to sell. In foreign NIKE's official website and a few shopping platforms mentioned it, the price is 60 dollars.