This kitty mat for litter box is designed with The 12mm 3D Convex honeycomb holes which are so big and deep that works twice better on trapping and lockdown/catching all kind of litter granules, such as clumping, clay, pine, corn, wheat, crystal and paper litters and others. It looks like an opened envelope because of the special double layer design. It could gather all litters effectively. The bottom layer of upgraded waterproof mat is urine proof which protects your hardwood floors and carpets from cat urine. It won’t be easy to move while the cats walk on it with the slip-resistant base.