In Winter it is a great thing to have a heated hat for outdoor travel, The heated scraft with cotton material for Far IR Technology same as sun heat when wear, comfortable and safety. Heated Hat For Women and Man Feature 鈼?The newest Carbon Fiber Heating Wire 鈼?FAR-INFRARED TECHNOLOGY, friendly skin 鈼?Machine washable 鈼?Heating Quickly, 3 Seconds to Make You Feel Warm 鈼?Up to 16.7 hours heated time Tthermostatic Heated Hat For Woman Material 鈼?100% ACRYLIC FABRIC 鈼?Cotton lining 鈼?Machine washable Men's Soft Shell Heated Hat Specific Out-Material100% ACRYLIC FABRIC Heated wireImported carbon fiber DepartmentUnisex BatteryLithium polymer 5000mAh ColorBlack or white High Level Heated Scarf Main Component Carbon fiberControllerPower bankHeating panel Certificate CE FCC MSDS PSE UL Heating Hat manufacturers website:http://www.yudefeng.net/heating-hat/