This Dream On Me double sided crib mattress is built to suit your child from birth through the toddler years. The infant side features a set of 150 steel coils with 6-gauge border wire that makes it firm enough to meet the unique demands of infancy. As your child grows, you can flip it over to let them 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.