Features: brand new and high quality Soft and Breathable Insulating Material: wool, and the heating cap is made of heating sheet. Embedded heating help concentrate heat in the ears on both sides to prevent the ears and for head from getting cold. This cap has been upgraded to use far infrared heating that can stimulate blood circulation. Very suitable for people with cold ears, migraine, hair care. Give you a warm winter. Temperature Controllers: The cap includes a charging cable with 3 thermal setting controllers, you can easily adjust the temperature. Two Ways of Use: It can be heated in winter or used in autumn without heating, multiple options. Winter Outdoor Sports: The unisex heating cap is suitable for men and women outdoor sports such as skiing, hiking, hunting, shoveling, ice shoveling, fishing, cycling, biking and other work or recreational activities in cold environments. This hat can let you forget about the cold and let you for focus on enjoying the outdoors. Specifications: Material: Wool Colour: Gray Style: with Battery, Without Battery (optional) Cap Circumference: 56- 60cm/ 22.05-23.62in Package Includes: 1x Heating Hat (2 options are available) 1x USB Data Cable 1x Rechargeable Battery note: Due to the lighting effects and shooting angles, there is color difference in the product, please understand. Due to manual measurement, there is a tolerance in the product size.