Cotton Plus Velvet USB Rechargeable Thermal Underwear 2-Piece Set Electric Heating Zone 11 Winter Smart Charging Heating Underwear for Men and WomenSmart electric heating underwear set: intelligent temperature control, 8 carbon fiber heating elements heat the core parts of the body, and heat the shoulders, chest, abdomen, waist, hips, elbows, thighs, and calves. USB CHARGE: The heated underwear adopts USB interface, powered by any 5V/2A USB portable charger. The USB plug is compatible with most portable chargers on the market. It can start heating in 30 seconds, and it lasts for a long time, and the heating time is long. Note: No charging treasure Temperature control: Thermal underwear can be charged, 3 levels of temperature adjustment, and the required temperature can be adjusted through the indicator light. Washing Instructions: Machine washable/Hand washable. If machine wash electric ski underwear set in winter, put the men's sports base layer in the laundry bag. In order to ensure the service life of the clothes, try to avoid strong washing and dry them normally. Rinse with clean water after washing without wringing dry. Let dry naturally. Multifunctional heated underwear helps to improve blood circulation and boost metabolism. Great for those with cold aversions, Raynaud's disease, arthritis, poor circulation, and stiff joints. Our USB heated thermal underwear set for men is the gift for the elderly, loved ones or friends. The best Thanksgiving and Christmas gift.