Ultra-soft flannel fabric provides maximum comfort and easy care. The plush material is washable, and the inner heating pad is removable for cleaning and hygienic use even with prolonged use. Experience warmth in cold weather with this electric USB foot warmer. It heats to about 45 +/- 5 degrees Celsius, helping keep your feet warm and comfortable even on the coldest days. Designed for comfort, this foot warmer uses a USB direct power supply with a 5V 2A input. It operates without an open flame, delivering safe, reliable warmth. Enjoy the heat with peace of mind, knowing there are no hidden hazards. Compatibility and use scenarios: - Powered by USB, compatible with standard USB ports and adapters for easy powering at home, in the office, or on the go. - Use at a desk or computer to warm feet during long work sessions. - Relax on the couch while watching TV, or in bed to warm up before sleep.