All great-moto tire warmers are designed to properly heat tires to the optimum temperature before track racing a bike. Tire warmers extend the heat cycles of race tires reducing the heating downtime between races. They build up tire heat evenly, which both enhances tire performance and prolongs tire life. The CE certified great-moto warmers are constructed of both dupont kevlar insulation sheets and dupont nomex thermal insulation fabric. This combination heats both the external and internal warmer fabric which insures heat from escaping. They come with ge silicon covered heating elements which are both water and heat resistant for electricity safety . The tire warmers use a standard 110v and a standard 230v outlet with a power consumption of 1000w (safe for all 1000w generators) The warmers come complete in sets of two - front and rear - for all models with complete sizes for gp125, gp250, supersport and supermoto bikes.