Choose Serta s SleepTrue Sparkling Sky 5-inch Crib and Toddler Mattress for your baby s standard size crib or toddler bed. Its thermo-bonded fiber core offers the long-lasting firmness and durability that s essential to baby s safety and growth while its lightweight construction makes it incredibly easy for you to change the sheets. Built to ensure a snug fit inside the crib or toddler bed this baby mattress is finished with square corners so you can rest easy knowing it s the perfect fit for your baby s bed. Topped with a waterproof vinyl cover Serta s SleepTrue Sparkling Sky 5-Inch Crib and Toddler Mattress will help keep baby dry and comfortable night after night year after year. This SleepTrue Mattress from Serta is GREENGUARD Certified for your child s safety and your peace of mind it also meets Federal flammability standards and includes a 5 year limited warranty. Designed by the same brand that s been leading the way in mattress innovation and technology for more than 80 years Serta s SleepTrue crib and toddler mattresses deliver comfort you (and your baby!) can believe in.