polyester fabric and filled with cottonImportedZipper closureMachine WashNoted : Battery Included 5V 10000mAh power bank with USB port. If you do not receive a battery, please contact our seller immediately and we will send you a battery free of charge.9 Large Heating Areas : Heated vest includes 9 carbon fiber heating areas generate heating across the upper, lower back and belly. Three heating settings: 60/ 48/39 with the carbon fiber heating system.Lightweight & Skin-Friendly Material: The smart heated vest is made of polyester fabric and filled with down cotton. This vest is much light and perfect for outdoor sports. In cold weather, heating with power bank can provide you with warmth a day.Long-lasting Warmth: The heated vest use safety 5V, a 1000mAh power bank that can last to heat for 6-8 hours, and it can be quickly warmed up in one minute. The heating vest also adopts carbon fiber heating which is safe and reliable.Comfortable Fabric & Easy Care: High-quality nylon provides incredible durability. 100% nylon provides you with warmth and comfort. The heated vest is designed to machine washing. Put the data cable of the heating vest into the zipper pocket before cleaningFor Most of Occasions: Perfect for the daily commute, for people who work outside, wear under their winter jacket or even in an office. Best gift for parents, families, friends, employees to enjoy motorcycling, hiking, camping, fishing and other outdoor activities in winter.Product Read moreSpread out the heating vests, you can see a stand-up collar design. A zipper that can be re-zipped, opened, flexible, and fits each other.Lightweight heating vests and with Skin-Friendly Materialeach Heated vest is made of polyester fabric and filled with down cotton.Fast heating speed, do not afraid of water washing, foldable, high temperature resistance, not easy to break the wire and resistance to pulling.