We bought this for under our breakfast table. It’s not really for indoor use. It will scratch your wood floors. And it’s already super thick, so adding a pad underneath would lift your table up 2”.  We tried to use it outside, but it just soaks up water and acts like a giant patio Petri dish. We ended up just throwing it away. There was really no way to salvage it or to find a situation where it would be useful.