about 2-2.5 inches thick, with soft organic cotton. It perfectly fit our cradle and did not have any odor, unlike 99% of the other baby items on the market today. It was also the least expensive one I could locate.
Since I built my own sidecar sleeper bassinet around the dimensions of this mattress, I was happy that the mattress was true to size. It fit perfectly, is very comfortable for baby, and gives me peace of mind that baby isn't sleeping on something made of plastic.
If you need further help or information please visit our Online Help Center