High Elastic FabricThermal underwear have the perfect blend of comfort, warmth, elasticity, and moisture protection.High-quality Carbon Fiber Heating Wire8 Carbon Fiber Heating ZonesThe Heated thermal underwear is equipped with 8 carbon fiber heating zones。USB InterfaceThe electric Thermals Underwear uses a USB interface. This means you can power the thermal underwear with any 5V / 2A power pack.Three-Speed Temperature ControlMachine ＷashableThe specifications are as follows:■ Power supply: USB power supply 5V/2A■ Temperature: 3 levels adjustment■ Suitable season: winter, autumnPackage includes: (no power bank)1*heating Underwear pantnotes:This item does not include power banks. You should bring it yourself. Please use 5V 2A 10000Ah or moreShooting with different power sources and different monitors may cause the color of the object in the picture to be slightly different from the actual object. The allowable measurement error is 1-3cm.Usually we will send you clothes of one size bigger, we are Asian sizeCleaning method: hand wash or machine wash with laundry bag