TourMaster Synergy 2.0 Electric Pant Liner (X-Large, Black) Durable Taslan outer shell with a comfortable liner 80G Polyfill insulation increases warmth and heat retention A temperature sensor regulates the maximum and minimum temperatures and provides a constant temperature Hook and loop adjustment leg panels allow for a snug and comfortable fit NOTE: Pant and chap liners require a power lead wiring harness and rheostat controller (included with jacket and vest liners)