Our 7lb carpet pad supports the floor by minimizing noise, maximizing warmth, and extending the life of the carpet. Also helps to keep carpet cleaner, allowing greater air flow and dirt removal during vacuuming. FHA Class II, heavy traffic rating. Made from new foam trimmings, no post consumer scrap, PBDE free. Passed CRI Green Label requirements for air quality assurance. Installs over concrete, vinyl, tile, and wood.