Thermal vest: Get a toasty with an electric thermal vest! Material: Vest constructed from 100% nylon - black or blue! USB port: Features a built in USB port for a fast a convenient way to connect and recharge via a power bank. Sizes: In sizes S-XXL. Carbon fibre element: Features two carbon fibre elements designed to generate heat across the collar and mid back area - complete with three adjustable settings! Lightweight insulation: Cleverly disguised as a lightweight gilet for a causal fit that won't weigh you down! Usb Electric Heated Vest | Black | Small | Living Social