Features： 1、Applicable Body Parts: USB electric hat is able to keep your head, ears, face and neck warm, or you are able to wear it alone as you needed. 2、Usage: Warm heating knitted hat is very suitable for outdoor activities such as relaxing walking, running, interesting hiking, skating and skiing. 3、Comfort: Electric heating warming hat has a soft velvet lining texture, better warmth retention, very close to the skin, lasting warmth and softness. 4、Elastic Function: Winter knitted heated hat is able to be stretched, and you are able to wear it regardless of the size or hairstyle of your head. 5、Warm Gifts: Rechargeable knitted hat can be used as a gift for your family and friends. as a surprise for them at Christmas and interesting birthday. Specification： Item Type: Warm heating knitted hat Material: Acrylic Temperature: 40-50 Celsius Suitable For Head Circumference: Approx.50-60cm / 19.69-23.62in Package List： 1 x Warm Heating Knitted Hat 1 x USB Cable