A little Christmas surprise: In every product we send out in the run-up to Christmas, you will find a beautiful Christmas card. We wish you a unique and merry Christmas! Soft Material: The feet warmer is made of knitted Lace Velvet + Anti-slip Fabric material, which is perfect heater to give warm and comfort to your foot and body in cold winter with reliable performance Replaceable heating patch with USB interface, you can connect power bank, computer, car charging adapter, etc., very convenient and safe, save power, the slippers will get instant heat to keep you feet warm all day It has high-end particle design on the bottom, which thickened and can keep warm, non-slip and anti-dirty. Washable and Detachable Design, easy and convenient to use to clean High Heating Efficiency: The heated shoes will heat up quickly and maintain a constant temperature with 3 minutes. Ideal for people who uses computer to work or study for long hours in cold winter, such as office workers, students, game players, etc Size:The heating slipper warmer is suitable for men and women, about 27.5cm/10.83inch in length, fits feet sizes up to 43. Lightweight and portable. Foot warmer is easy and convenient to use. It is the perfect gift for your family, friends and partners. Note: You need to wash by hand. When washing slippers at home, remember to remove the heating pad.