Description 

Keep yourself warm while listening to your favourite tunes on the go! 

This gadgety hat does not only provide you warmth during winter, but also allows you to listen to your favourite music. 
Also makes a wonderful present for any age. 
Compatible with devices that have a 3.5 mm earphone jack
Easy operating - just plug into the suitable device and play

Details 

Material: knitting wool
Plug diameter: 3.5mm