Made of woven basalt lava rock materialBasalt Exhaust Wrap can withstand up to 1,800°F continuous operation and 2,500°F intermittentStronger than standard fiberglassAvailable in natural bronzeMade in the U.S.A.EU: Basalt Exhaust Wrap can withstand up to 982,22 °C continuous operation and 1371,11 °C intermittent