Features: brand new and high quality Rapid heating of 70°C in 30 seconds, osmotic heating. Soft and Breathable wool Material and use carbon fiber filament far-infrared heating. It help concentrate heat back of the for head to prevent the for head from getting cold. Very suitable for people with cold ears, migraine, hair care. Give you a warm winter. Intelligent three-stage temperature control heating cap: far-infrared heat compress, mobile power supply,Add velvet to thicken, intelligent temperature control, no fear of washing. 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: Black, Wine Red, Gray(optional) Cap Size: approx. 24x24cm/ 9.45x9.45in Package Includes: 1x Usb Charging Heating Cap(not including power bank) 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.