Product DescriptionDream On Me 27X-Co, 3" Firm foam mattress fits the fun sport play yard dimensions: 37.5"X25.5"X3" And accommodate other play yard with the same dimension. Its contracted created a comfortable environment to play and sleep. This exceptional mattress is manufactured with quality materials and workmanship in the USA, featuring a hypoallergenic, anti-bacterial waterproof cover that wipes clean with mild soap and water and aids in the prevention of mold, mildew and odor. Meets Federal Standard Flammability Standard 16-CFR 1633.From the ManufacturerDream On Me recommends this mattress to be used with the below listed ?Play Yards? Cosco Funsport Delux Playard #PY384 Chicco Lullaby LX Playard # 06079059500070 Baby Trend Nursery Center Playard # PY81400 Graco Pack 'n Play Playard with Automatic Folding Feet #1801373 Chicco Lullaby LX Playard # 06079059500070 Graco Day2Night Sleep System #1907179 ? When using this mattress, please make sure it fits tightly in play yard without any gaps between mattress and side walls of the play yard. ? NEVER use this mattress on the top level of Play yard in its bassinet position. ? KEEP ALL FOREIGN OBJECTS OUT OF THE PLAY YARD Including ? Pillows ? Quilts ? Comforters ? Cushions **Or any other object that is not intended to be used inside a play yard**