Fit great: This mini crib mattress protector measures 24 inches x 38 inches x 3.5 inches. Fits all standard mini crib mattress. waterproof and breathable: Not only the top surface is waterproof like other zippered encasement, the 4 sides of this zipped mini crib mattress cover are waterproof, which can keep pee or any other liquid from leaking into your mattress through the sides. In addition, the bottom fabric is non waterproof but breathable , which allows greater airflow goes through the playard mattress. High-quality zipper: To avoid the zipper getting stick or dislodged when changing the mattress cover, we use the best zipper on this mattress protector. Also, the quality of stitches you can trust which will not popped and ripped for a long time. Super soft: This pack n play mattress protector is filled with soft padding which will gives your little one an extra comfort sleeping night. Easy Care: The waterproof crib mattress protector is totally machine washable and which can be dried in the dryer or by airing. Features: The material absorbs moisture naturally. High quality zipper: Secures the mattress from topper to side. It creates no sound when sleep. It is completely waterproof. Machine washable. Cleaning Tips: a. Gentle wash to a max heat setting of 40℃/100℉.Tumble dry. Low heat. Do not iron. Do not dry cleaning. Do not bleach. b. Light-colored products should be washed separately from dark products during cleaning to avoid staining each other.