New Gorilla Pad makes old foam floor padding obsolete. Unlike foam, which can be easily cut by grass, roots or rocks under your liner, Gorilla Padding is impervious to almost any sharp object. Gorilla Padding is a geotextile that was developed to protect trash dump liners where any cut would be a catastrophe. Gorilla Padding is super tough, but also adds a layer of cushioning that will eliminate footprints from forming. Gorilla Pad is cut to size and seamed for your pool. No more cutting and taping as with foam. Virtually eliminate vinyl liner bottom leaks with Gorilla Pad. Will stop nut grass.