Made of high quality material, soft and comfortable to wear. USB rechargeable design, you can connect with your power bank, adapter, computer for charging, very convenient.Washable, you can wash it by water when there is odors.With it, you do not need to worry your feet will be frostbite in winter. Features: Durable, Soft, USB Rechargeable, Washable Notes:After washing, it must be completely dry before use, and USB cable connector as far as possible do not get into the water, prevent it rust and then caused poor contact.Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement. all Products From Us Have Undergone Strict Quality Checks. if There Is Any Quality Problem Or You Are Not Satisfied With The Product contact Us. we Will Give You The Best Solution.