The new Zarkie Bluetooth Controller USB Battery Heated Socks now come with the ability to control them from your phone which makes customising your heat even easier. The heating element is located underneath the toes which work with your shoes to trap the heat in and keep the rest of your body warm. We all know that once your feet and hands get cold then your body will follow. The socks offer 3 settings that can be controlled from the Zarkie APP which can last for 9+ hours on the low setting. They can also be used without the Bluetooth controller and and powered directly from the battery. Having the electronics built-in to the battery itself means you can remove all the sensitive parts of before washing which gives them a huge life span. The cotton fabric makes them soft, breathable and comfortable as well as durable. The new Zarkie Bluetooth Heated Socks are the best way to keep your toes warm this winter! Sizes: S/M 40EU and below L/XL 41 EU and above