This heat shield is a sturdy, custom-fit cover that double-insulates your Super Sun 2, Yield Master II Supreme air-cooled, Magnum XXXL or Hydrofarm air-cooled hood against the heat your lights generate. With the reflector heat shield, less heat escapes into your room and is instead contained within your hood to be better carried away by your existing air-cooling. This results in a cooler environment, happier plants, and energy savings in the form of increased A/C efficiency. Not only does it cool, it quiets that roaring air inside the reflector. The IR blocking material is soft, durable, machine washable and constructed from two pieces. A high-quality, insulating, wool liner covered with a radiant barrier fabric. Professionally made in the USA with patent pending.