Thermal Vest: Get toasty with an electric thermal vest! USB Port: Features a built in USB port for a fast a convenient way to connect and recharge via a power bank. Manual Heating: Or enjoy the manual heat setting on high, low or medium temperature. Automatic Heating: Automatically heats up when red light flashes. To Use: Turn on via the power switch and hold for 3-5 seconds. Sizes:In sizes M-3XL (Height 155cm -160cm -180cm-185cm). Men's Electric Thermal Vest | Black | Living Social