Sealy Naturals Cotton Crib Mattress Pad An innovative mattress pad made of 100% cotton and 100% cotton top and bottom 300 thread count and thread-stitched quilting for lasting durability. SnugFit deep pocketed spandex blend skirt prevents sliding and shifting. Hypoallergenic. Machine washable and dryer friendly. Fits standard crib mattresses and toddler beds. 52”x28” #b3