The Gladon Perfect Pool Bottom Package combines two great products, the Perfect Pool Bottom and a Pool Cove, into an affordable package designed to protect your aboveground pool investment and extend the life of your liner. Perfect Pool Bottom protects your pool liner from rocks, glass, nut grasses and other substances that will puncture your liner. The Perfect Pool Bottom is easily installed on the floor of the pool before the liner is put in. Made of synthetic material that does not compress, providing comfort and greatly extending the life of the liner.