PRODUCT DESCRIPTION The Sealy Cozy Brilliance Premium 2 Stage Crib Mattress and Toddler Bed Mattress is a lightweight, sustainable design that includes a soft, breathable rayon zip knit cover. The grow-with-me supportive core includes a very firm infant side and a cozier toddler side entirely made with Earth-friendlier sustainable fiber. The rayon cover is soft, silky and breathable on baby's skin. Zip-off cover for easy machine wash. Essential waterproof barrier keeps liquids from seeping inside babys mattress. This standard crib mattress measures 52 inches long x 28 inches wide x 6 inches thick and provides a secure fit in U.S. standard size cribs and toddler beds. All Sealy baby crib mattresses are GREENGUARD GOLD Air Quality Certified for a healthier indoor environment. Kids mattress features square corners for a snug fit. Weighs less than 8 pounds to easily lift and change crib sheets. Gentle on baby, no polyurethane foam, memory foam or latex foam materials. Tagged with infant and toddler sides. Meets ASTM Crib Mattress standards for safety, quality and lasting durability. Lifetime warranty on workmanship and materials. Sealy is America's #1 crib mattress brand. Best, safest baby mattresses for crib - a baby registry must haves! FROM THE MANUFACTURER Sealy Baby offers the most trusted crib mattresses and offers safe, supportive, and comfortable toddler bed mattresses, bedside baby bassinets and protective premium crib bedding that parents have depended on for decades. As the leader in safe sleep, comfort, and lasting quality for years, more babies sleep on a Sealy than any other brand in the USA. Sealy Baby crib mattresses are firmness tested to help reduce the risk of suffocation and provide a supportive sleeping surface. In addition, 100% of Sealy Baby crib mattresses are American made by experts who help create industry standards to ensure safety and quality for infants and toddlers. Every baby mattress is Non-Toxic, ASTM Certified, CPSIA Certified and Greenguard Gold Air Quality Certified for a healthier sleeping environment, tested for low chemical emissions, and are made without harsh chemicals for a safer sleep. Sealy Baby's collection of breathable bassinets, bedside sleepers, comfortable diaper changing pads and top-rated, hypoallergenic protective crib mattress pads and encasements are nursery essentials and baby registry must haves that every new parent desires for their newborn. Parents rest easier with a trusted brand, quality products and customer care that is always here to help your family sleep better.