About this Item. Heating underwear suit: rechargeable battery electric heating underwear, knee, back, waist and double heating, relieve shoulder, waist, and abdominal discomfort. Rechargeable heat: designed for extended and repeated use in cold weather. Single wear or layered wear. Ideal for people who are outdoors, skiing, snowboarding, hunting, fishing, biking, biking, camping and working in frozen warehouses. Stable performance: built-in carbon fiber heating element, fast heating in 10 seconds, up to 55C. Stable performance, safe and reliable, , soft and comfortable. Three gears adjustment, one key switch. Jacket and pants with independent . temperature control. Long press for three seconds to turn on or off, the temperature of the red light is about 45-55C, the blue light is 25-35C, and the white light is 35-45C. Wide range of functions: The three key parts of the pants are heating. Carbon fiber heats the abdomen and knees. It can relieve cold discomfort of legs and feet, knee discomfort, and resist cold wind. Notes for washing: Wash without fear. Take out the battery. The power interface is insulated and waterproof. It can be washed and machine washed. It is recommended to use a laundry bag for machine washing.