Features Specification Features: Stay warm and cozy all winter long with our men's high collar heated cotton vest. The high collar design provides extra conservation against chilly winds, ensuring maximum warmth. The carbon fiber heating elements are strategically placed to provide even and consistent heat distribution, keeping you warm from your back to your abdomen. Our smart and safe heating vest ensures a constant and 3 adjustable temperature levels - 25°C, 35°C, 45°C with just a click of a button to suit your needs. It is the perfect winter essential for battling the cold. Powered by a portable mobile power source (not included), you can enjoy hours of warmth wherever you go. The vest is designed to be compatible with most power banks. The IPX3 waterproof feature ensures that you stay dry and comfortable even in light rain or snow, while the four heating zones strategically target your neck, back, and abdomen. How to Use: 1. Take out the USB plug. 2. Access the power bank and press the power bank output switch. 3. Press and hold the chest temperature switch for 2 seconds. 4. The red light is blinking, indicating automatic temperature control heating. 5. After the red light blinks for 5 minutes, the white light automatically turns into the medium temperature control. 6. Manually adjust to the 3 gears, red light for continuous high temperature heating, white light for continuous medium temperature heating; blue light for continuous low temperature heating. 7. Long press the temperature control switch for 2 seconds to stop heating, and indicator light off. Washing Instructions:Take out the charging bank, add neutral detergent to wash by hand, do not rub or push, the said clothes can be used after natural ventilation to dry. Note: 1. Do not access the charging bank if you do not use it for a long time. 2. Do not use high temperature water or strong acid detergent. 3. Turn off the power supply and stop using when the vest get wet. 4. The use time depends on the capacity of the charging bank. Specifications: Size Optional: S, M, L, XL, 2XL, 3XL Material: Fabric - 100% polyester fiber, Lining - 100% polyester fiber Waterproof: IPX3 Color: Black Package List: 1 * Heating Vest Package List 1 * Heating Vest