Soft and warm: Our heated shoes have soft inside, wear-resistant and non-slip soles. The fabric is very elastic, and heated home shoes can make your feet comfortable and warm, and prevent your feet from being injured by cold in winter. USB powered: Quick heating and high temperature. The highest temperature can reach 150 Fahrenheit. With the working voltage of 5 V, saftety to use. And you can plug into the pc and notbook usb port,power bank.Or USB adaptor(such as cellphone adaptor). 3 Heat Level Settings: There are 3 thermal setting controllers that allow easy adjustment of temperature, high,medium and low temperaturethat are 131,122 and 113 respectively, And 3-timing settings, that are 120 minutes,90 minutes and 60minutes Light and Comfortable: The weight of each shoe: 0.4 KG. The soft vamp and the thick warm-keeping filling cotton enables shoes to be very elastic, The heating shoes can make you no longer fear of cold. Size: 32*25cm/12.6in*9.8in.One Size Most fits UK size 4-8, thermoplastic elastomer,suitable for feet with different sizes. It is the best gift to bring your family and friends warmth for Christmas birthday.