Product name: Heating vest Productfeatures: intelligent heatingFever area: 5 districtTemperature change: Third gear Third geartemperature: low 45 ° C MEDIUM RANGE 50 ° C high-Grade 55 ° CMaterial: Polyester materialColor: BlackSize: S, M, L, XL, XXLModel Number : Heating VestMaterials Technology : POWER DRYMaterial : PolyesterFeature : ThermalFit : Fits the actual size, take your normal size.