100% Polyester Machine Wash 11 Heating Zones & Safety It can heat up your entire core body areas and keeps you warm.Once overheated, the Built-in thermal protection module helps stop the heating and keep you warm and safe at the same time until the heat return to the standard temperature. Rapid heating&USB Charging: The ltra-thin carbon fiber heating can heat up to 50/122 within 2-3 seconds. The jacket comes with a USB universal charging portPowered by any 5V/2A power bank (low and safe voltage), USB plug(inner the left pocket) is compatible with most power bank on the market.You don't have to worry about the lack of electricity from a special power. ( keep warm time can vary with different capacity of power bank); Power bank is NOT included in this heated jacket. The heated jacket for men is Ideal and warm choice for you to enjoy outdoor activities like snowmobile, motorcycling, mountain climbing, camping, hiking, skiing, Fishing, Hunting or and chilly climate.