“The mat catches most of the debris that my kitty "splashes" out of her litter box. For it to work the best expose as much of the mat as possible. Don't place it under the litter box. I only gave it 4 stars because when I vacuum the mat I am only able to get some of the litter out. The way the fibers are trap some of the litter. I figure I will need to replace the mat every 3-4 months to keep it as effective as possible.”