Proflow's BST-TITB titanium turbo blanket is made from volcanic rock fiber, and includes a high temperature rated silica insulation matting under the tight outer layer for extra added protection againest extreme turbo-generated heat. The inside layer material can be volcanic rock fiber or special 96% silica fiber. They are more durable than other turbo blankets or shields. It can withstand direct heat to 1800 F and 2000 F radiant heat.