I didn't even think that the purchase would be so successful. The sand problem has practically disappeared. Bought for $6. Size 40/60 we have in stores mats for $27. But they're rubber heavy. And cells in the grid are smaller. For $6, the mat is lightweight. Both layers of EVA material. We have cribs on the floor from such material and Cats pull and gnaw them. I was afraid that I would not have time to spread this one, they would spoil it. But no. Everything is great. This Mat did not interest them. Came in a couple of weeks