describe: Comfortable to wear: The USB heating cap is made of super soft, skin-friendly knit and is comfortable to wear. Good warmth retention, light weight, no burden on the neck/head. Very suitable for cold autumn and winter. Multiple uses: The heated winter hat can be used as both a hat and a scarf, remove the string from the hat and wear it around your neck, it turns into a scarf. One size fits most men and women. Enjoy winter indoors and outdoors with our warm bonnet beanie scarves. USB Heated Knit Hat: Heated hat drives away the cold in just a minute. The heating temperature is approximately 45C. USB connection, just plug in power bank/computer/portable charger. Wide Application: The heated hat is perfect for casual daily wear, hiking, running, baseball, tennis, hunting, biking, camping, fishing, skiing, skating, traveling, motorcycle riding, etc. Warm Gift: The winter USB heated hat is the perfect warm gift for mother, father, wife, husband, daughter, son, girlfriend, boyfriend, niece, friend, classmate, etc. Best gift for Halloween/Thanksgiving, Christmas/Mother's Anniversary/Father's Day/Valentine's Day/School Day/Birthday, etc. Package contents: 1 piece of heating hat