Version: Slim fit Style: Hedging Collar type: stand collar Placket: zipper Whether hooded: not hooded Thickness: thickened Fabric name: polar fleece Main fabric composition: polyester fiber (polyester) Lining composition: polyester fiber (polyester) Instruction: Lightweight heated vest perfect for the upcoming winter months. It will keep you warm on the way to work or on a walk at night. It's classy so you can put it on your clothes. The vest does not hinder movement, so you can also wear it under a coat or jacket. 5-zone heating, even temperature distribution, so you feel comfortable. The heating time is longer and the warmth retention is better. The heating surface is the important parts of the waist, neck and abdomen that are prone to cold, which can effectively protect the health of the body Note: Before washing, remember to take out the power bank and put on the waterproof cover of the USB port. Heating principle: built-in heating system, power bank to supply heat Three-speed color-changing temperature control Red light: about 50 degrees Blue light: about 40 degrees Green light: about 30 degrees