Conductive Material- XL Material is a thermoplastic polypropylene material based upon carbon black that has a surface resistance of less than 1.0x10^4 ohms or surface resistivity of < 1.0x10^5 ohms/square. XL material has a static decay rate from 5,000 volts to 0 in less than 2 seconds. This material has a useful temperature range of 40F to 225F, with intermittent use recommended at the higher end of the temperature range. The electrical properties of this material are permanent and unaffected by washing.