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ObboMed Far Infrared Carbon Fiber Heated Foot Warmer/Boots/Slippers, USB 5V 10W – Auto Off, Size M (fits Foot up to 41)
Powered by 5V low-voltage USB outlet with the latest carbon fiber heating technology for heating function. Two heating levels With LED power indicator to display heating levels for best using experience Green light indicates Level I (gentle warmth, 5W), red light indicates Level II (fast warmth, 10W). Soft sole design for comfy touch, designed with zippers for better wearing comfort and convenience Two-piece booties designed for providing more mobility than conventional foot warmers; allow users to move more freely in the surrounding area. *Note Not suitable for outdoor use. Heating temperature up to 

Price is $60.00
Price: $59.99