Protect parts, hoses and paint from heat damage, Increase spool time and reduce underhood temps The best materials available with a higher tensile strength than fiberglass; Outer: “Titanium”, Pulverized Volcanic Rock; (Continuous-filament (Basalt), Innner: Calcium Magnesium Silicate Wool, Lining: High Heat Silica Fabric; Fully protected with sewn in Stainless Steel Mesh Silica infused volcanic rock (Basalt Lava Rock); Insulated with Calcium magnesium silicate fiberglass wool JC Performance turbo blankets help you get the most out of your turbocharger The JC Performance Products USA Carbon Black Line of Turbo Blanket are thermal barriers that reduce turbo lag, increase spool time and greatly reduce under hood temps while protecting engine parts, hoses, body parts and painted surfaces from high heat damage.