Polyester Imported Zipper closure Machine Wash Smart Temperature Control--TIDEWE heated jacket contains features 3 adjustable heat settings with just a simple press of the button, blue means low, white shows medium and the red indicates high. Up to 10 working hours on the low, 5.5 on medium, 3 on high. Comfortable & Safe--Water & wind resistant breathable exterior polyester fabric with anti-static fleece liner traps the heat and provides a soft and comfortable fit. TIDEWE heated jacket applies the battery with UL, FCC, RoHS, CE certification. Once the temperature is beyond 131 , the battery will turn off, keeping you warm and safe at the same time. Easy to Maintain--Jacket is made by high quality fabric and fleece. Also please make sure the jacket and USB interface are completely dry before use. Air-drying is suggested to protect heating elements better. User Friendly Design--The High quality YKK zipper are designed to protect you from the cold and wind. Precision stitching ensures durability. Best for All Outdoor activities--Quick charge and up to 10 hours working by portable-convenient 10000mAh power bank, you can stay warm in all outdoor activities like hunting, ice fishing, ice hockey, snowmobile, motorcycling, camping, mountain climbing, hiking and even doing outdoor work. (Please note that this product does not include charging treasure)