!!!!Important Reminder: This product is made of fiberglass. Do not rub it directly with your hands. Wearing gloves is recommended. Do not machine wash. Keep out of reach of children. Thank you! It has fire-retardant properties, but it cannot withstand continuous exposure to open flames without deforming or burning. If you intend to use it for open flame applications and have very high requirements, please consider carefully before purchasing! Fiberglass's primary function is flame retardancy; if your main application is for heat insulation, please do not choose it. Thank you!