Go Green with the FF135 Insulation Protection Cover and start saving money on your energy bill. The TENMAT FF135 Recessed Light Draft Stop Cover is a fire resistant enclosure that was specifically designed to protect your light fixture from insulation in the attic and to stop unwanted air leakage through your recessed light. The FF135 has been tested in accordance with UL1598 for usage with IC and Non-IC rated recessed lights. Most recessed lights are not compatible with insulation and often times start cycling on/off after they have been buried with cellulose, foam, fiberglass, etc. The lights' malfunction is a concern and a safety hazard. Pushing the insulation away is not an effective solution since it creates air passages in the building envelope and wastes energy. Due to the improved airtightness and insulation, TENMAT users experience significant energy savings. TENMAT Recessed Light Covers allow the insulation to be continuous and uninterrupted over the whole area of the ceiling, therefore saving energy and carbon emissions. The FF135 covers are fit within seconds and do not require assembly or special tools. Simply put the flexible and lightweight cover on top of your light fixture - Done Deal! The durable dome-shaped design ensures that the insulation is kept at a safe distance from the light, preventing combustible materials, such as blown-in cellulose, to come in contact with the hot light.