Smart usb charging heating hat men’s winter warm hat outdoor cold hat knitted bridle electric heating hat tideFeaturesWool plush fabricHead circumference: 57-58CMThree-speed temperature control smart heating cap. No fear of extreme cold at minus 10Fast heating in 30 seconds, the flexible material has a good footprint and no pressureWashing machine wash and hand wash can no longer worry about washing problemsNote: When cleaning, be sure to wash gently to prolong the life of the heating element.< /p>