With its convenient two-in-one design, this Dream On Me Lullaby 2-Sided Crib Mattress is built to suit your child from birth through the toddler years The infant side is all about support: its set of 224 steel coils and its six-gauge border wire make it firm enough to meet the unique demands of infancy. Once your child gets a little older, you can flip it over to let him or her enjoy cushy comfort that's perfect for active youngsters. Both sides feature a wet-proof, triple-laminated fabric cover that's easy to clean. This mattress was carefully engineered and balanced for use in any Dream On Me crib. A hypoallergenic, anti-bacterial waterproof cover aids in the prevention of mold, mildew and odor. Easily wipes clean with warm water and mild soap. This Dream On Me Mattress meets Federal Flammability Standard 16CFR 1632 and The California Bureau of Home Furnishings Technical Bulletin 603 and is lead and phthalate pass.