When my 0-year-old son started moving around, I looked for a play mat for babies, but I was worried because it didn't match the atmosphere of the room. I thought that I could use this as a play mat by layering it with my favorite rugs, so I bought it together with the N Cool Rug, which is 1.5 cm thick. It's very soft, so even if my son turns over and hits his head, it's fine! He hasn't cried once yet. It's much thicker than the puzzle mats you often see, so I'm recommending it to all the other mums! By the way, I was wondering whether to use a single 3cm N Cool rug without a rug pad, but I thought that with the 1.5cm rug there were lots of different patterns to choose from and it could be washed, and that it would also make it easier to change the rug with the seasons, so I decided to go for the combination of rug pad and rug. I think it was a great decision, as it gave me more options.