Choosing the right crib mattress for your newborn baby will not only ensure a safe and comfortable sleeping environment but will also support babys growing bones. A crib mattress is designed to be firm and fitting, reducing the risk of SIDS. A full size crib mattress should be no more than 6 inches thick by law. BabyAge.com has a vast selection of well known and trusted brands to choose from such as Sealy and Naturepedic that guarantee quality and sustainability. What could be better than a brand that assures a mattress free of harsh chemicals? More than half of the crib mattresses and crib mattress pads at BabyAge.com are eco friendly and certified organic.