1Infrared heating, fast heating, good warm keeping effect. 2Intelligent temperature control, three gears temperature adjustable, enough to meet your different needs. 3Washable design, it can be washed by hand or machine, remember to remove the battery before washing. 4Adopts high quality polyester pongee fabric, skin-friendly and breathable, make you feel comfortable. 5Large capacity battery, long standby time, you can wear the vest when going out.