Serta Nightstar Extra-Firm Crib and Toddler Mattress: * Top inside layer is Serta Fireblocker, providing gentle sleeping and safety using exclusive material * 25 year warranty against manufacturer"s defects * Adorable Serta sheep vinyl cover * Exceeds federal and state flammability standards (16 CFR part 1633) * Additional support provided by a polyester layer for an extra firm, safe, sleeping surface * Balanced support from full perimeter border wire for firm edges when baby is standing * Extra-Firm Nightstar Crib Mattress features an environment protected by a specially treated, heavy laminated cover which provides anti-bacterial and anti-microbial protection * Security of edges assured by heavy duty cloth binding with lock stitching * Crib and Toddler Mattress fits all standard toddler frames * Made in the USA * Mattress wipes clean with a damp cloth