Home Legend laminate is environmentally-friendly since it's made from 100% recycled wood fiber and paper. But just because it's recycled doesn't mean it won't last. The raw materials are subjected to high pressure to create extremely tough material called a high density fiberboard (HDF) core, like coal turning into a diamond. The top layer is resincoated and made of cellulose, making it durable enough to protect the photographic image of natural wood beneath. The underlayment is already attached. It protects against moisture, reduces noise, and provides a cushion to absorb shock. Home Legend laminate floors even come with a 50 Year Residential Finish Warranty. The click-lock system allows for easy installation without glue, below, on, and above ground level. It installs over most existing floors.