Give your baby a good night's rest with the Serta Extra Firm Tranquility Mattress. A good firm mattress also provides a safe and healthy sleep surface for baby's developing spine. Balanced support is provided through heavy gauge spring coils, corner supports and a full perimeter border. The easy to clean laminated cover will ensure that if any accidental leaks should occur, the mattress padding will not be affected. In addition, this mattress features dual sides, Side 1 is for infants, while Side 2 is for active toddlers. this mattress carries a 10 year warranty.