I just received this mattress and I am very disappointed.  I didn't even want to give it a star but you are forced to.    In my opinion It is very cheaply made and you can only use one side.  It is not even worth my time to send it back.  I will probably put it on the floor as a mat for my grandkids to play on.  I will not let our newborn sleep on it.  I really expected a lot more.  I guess in this case you get what you pay for.