Graco Ultra-Premium 2-in-1 Crib Mattress..Got from TryIt
Although this arrives in a small box, it is not a thin item just packed very well.
Then the mattress will unroll and lay flat.Absolutely satisfied with the quality 
and size.I recommend firm mattress for babies and small children toddler beds. 
It has high quality breathable foam that maximizes air flow for my baby to help 
her get the rest she needs.I am very impressed with the comfort and the safety 
features that it comes with..I highly recommend.