Milliard 2-Inch Ventilated Memory Foam Crib and Toddler Bed Mattress Topper SLEEP IN COMFORT – this topper is designed just like the memory foam toppers on adult beds to provide contouring comfort that’s soft and soothing on tiny bodies and reduces tossing and turning. WATERPROOF COVER – comes with a top-quality, hypoallergenic cover that’s both waterproof and washable so you can rest easy knowing your topper is protected from spills and other nighttime accidents. QUALITY THAT LASTS - constructed of 2-inch-thick, luxurious, 100% memory foam with a premium 2.5 lb. density so your topper can last for years without losing shape. Aerating holes are carefully added to each topper to increase ventilation while your child sleeps.