We got a free hand-me-down mattress for when Peanut was born. Since Stachio's mattress was better in the crib (tighter fit - smaller gaps) I moved his mattress back to the crib and used the softer hand-me-down for him in his toddler bed. I know it was still a crib mattress though. I couldn't tell you the brand...I'm certain it wasn't organic...and was probably from Walmart or Target.
I don't worry about things being too cushy for my kiddos...they will elect to sleep on the hardword floors about 1/2 the time....
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DS - Adopted by loving parents 1995
DS1 7/2009 ('Stachio)
DS2 9/2011 (Peanut)