Product Detail All around heavy gauge steel border rods maximize side, corner and edge firmness Steel vertical bars distribute baby's weight evenly over the entire surface of the mattress Two non allergenic layers insulate the mattress for lasting durability Third non allergenic layer provides additional support and fourth non allergenic layer offers a plush, gentle sleeping surface Sealy mattresses meet or exceed the current phthalates standards set forth by the CPSC and meet federal flammability standard 16 CFR 1633 . The "Sealy Baby Posturepedic Mattress" is best product for you. We recommended Sealy Baby Posturepedic Mattress