Features 1. Black technology heating, applied to the abdomen, shoulders, neck, and spare parts, has a good resistance effect against winter cold problems. The heating is uniform, and three temperature control is used to warm you up throughout the winter. 2. Fine Design: Durable and smooth zipper design, practical zipper pocket design, three control and three gear switch design, and safe USB interface design. 3. Multifunctional Mode: Gently press and hold the switch for 2-3 seconds before heating up quickly! Short dark key, three controls and three gears can be adjusted freely. Blue gear: Low temperature, daily warmth. White range: medium temperature, dispelling cold and dispersing cold. Red gear: medium temperature, outdoor cold resistance. 4. Not Afraid of Water Washing: This product can be washed directly without worrying about water washing issues. The power interface is treated with waterproof bonding. (Kind reminder: The USB interface is hidden in the inner pocket. Remember to remove the power bank before cleaning) 5. Large Area Heating Area: Far infrared heating, multiple heating areas, warm cotton clothes, multiple heating areas on the neck/shoulders/back/waist/abdomen/arms. Specification Material: Cotton Color: Black Clothing SizeS, M, L, XL, 2XL, 3XL Size: 35 x 30 x 5 cm Weight: 510 g Package Include: 1x Intelligent Heating Vest