This bobble hat is the ideal hat for winter. Easily connect your smartphone or MP3 player to the built-in stereo headphones thanks to the universal 3.5mm jack plug. Protect yourself from the cold without sacrificing your favourite music: you can handle travel, walks or sports even in winter while listening to your playlist. In addition, it will transform into a comfortable winter hat that you can take with you on any occasion. This hat features a microphone and an answer button, so you never have the risk of missing calls and messages again. Adjust the volume as you like with the sound control. Avoid the uncomfortable feeling you feel by wearing a hat over your headphone for music and always taking a comfortable, soft and trendy accessory.