PLEASE NOTE: The product comes with a Christmas card so you can give the product as a gift to your friends or family at Christmas. USB heating slippers. The electric foot warmers are charged with a USB cable. Simply plug in the slippers with the included USB charging cable and the slippers will heat up instantly to keep your feet warm all day long. Easy to cleanOur foot warmers are hand or machine washable, but be careful not to wring them out by hand. The shoe casing can be removed for cleaning, which is very convenient and practical. (Note: slightly disassemble the electronic components of the shoe before cleaning to avoid damage). High quality materialMade of high pile fabric, the surface of the slipper will not peel off, comfortable to wear. Wrap your feet comfortably, promote warm and relaxing feeling, suitable for adults to warm their feet in cold weather. Warm up your winter ideal for wearing while watching TV, at the office, camping, after a long run or workout, after a cold day outdoors, keep your feet warm at night, this foot warmer has enough energy to get your feet back to work. Quick to provide warmth, let your feet relax better on cold days. Nice giftThe size of grey electric heated slippers is between 39 to 43, our USB foot warmer is suitable for both men and women. You can gift it to your friends and family to bring them a warm and comfortable winter. Note: Our product does not come with battery and should be connected to the USB charging port for normal use. Please confirm the product instructions and applicable settings before purchasing.