So guys we all want our little baby’s to be comfy and safe in there cot. (We want them there more often than not) But we also need them to be safe outside there cot when playing. I didn’t know how to make sure of this, until another mom recommended me foam. I feel like if I don’t pass this knowledge on then maybe a baby could avoid being hurt but there’s a foam called closed cell. I think it is what is used in mats (not too sure) however i got a square piece a inch thick cut to the size of my sons play pen and now i have peace of mind that he wont hurt his little self whilst playing, he’s always stumbling and falling over, I would recommend all you mums to be to have a look at this for peace of mind.