You can put it directly in your jacket vest and other clothes for warm keeping and heating using a 5V 2A power supply such as a computer power adapter or power box this product does not include a power supply Using soft fabric builtin thermal insulation fiber heating material comfortable and wearresistant durable Imported composite fiber heating wire is used the heating wire is densely routed even heating the temperature is high not easy to oxidize burn out the circuit etc and the service life is long The switch adopts full waterproof coating for better waterproof effect The electric wire has the characteristics of resistance to folding waterproof tensile strength and long service life Repeated cleaning will not affect the use It has a certain degree of folding and water resistance even heating washable but do not immerse in water for a long time the cloth is stuck together longterm soaking may affect the adhesion of the glue