Saving you money year-round! Made in USA Guard your house against extreme temperatures and humidity entering though the termination cap of your direct vent fireplace. Our Termination Cap Cover is the perfect solution! Our cap cover is a double-sided, multi-layered industrialized-strength, lightweight solid (non-breathable vapor barrier) aluminum radiant barrier approximately 6.5 mils in thickness that reflects (blocks) 97% of the radiant heat that strikes its surface! We use radiant barrier foil and insulation products which are beneficial in ANY application where the goal is to CONTROL HEAT. When placed between a source of heat and an area you wish to keep cool, the surface of our radiant barrier material reflects 97% of the radiant heat energy back towards the heat source keeping the intended area cooler. That's a significant amount of protection against unwanted heat gain in the summer and unwanted heat loss in the winter and results in lowered monthly utility bills. Overtime, these monetary savings add up and continue to provide energy savings for years to come. It is non-toxic, non-carcinogenic, fiber-free and is not affected by moisture or humidity. It is Class A/Class 1 fire rated and made is the USA. Lower your heating & cooling bills year-round! It's easy to install and easy to remove when you use your fireplace. MADE IN USA Enclosed with each Termination Cap Cover is a wire tie on NO FIRE tag to be put on your pilot light. This is to be attached when you install the Termination Cap Cover and will alert any person lighting the pilot that the cover is still on. Houses still need to breathe a bit. Our cover is not a 100% seal. But it will definitely stop warm air in the summer and cold air in the winter. - NO FIRES, NO PILOT LIGHTS WHEN TERMINATION CAP COVER IS IN PLACE.