COMFORTABLE PACK N PLAY MATTRESS: Replaces the thin and firm mattress included with pack-n-play and increases the comfort of the portable bed, making napping easier and peace of mind for mom and dad. Make the whole family's travel and vacation more enjoyable.NO GAPS & FIT MOST PACK N PLAY: Rounded corner design fits most portable bed (dimensions: 38" x 26" x 3") with no risk of unsafe spaces and gaps. Please measure yours pack and play first to ensure a perfect fit for playpen mattresses.COMFORTABLE SLEEPING: 3 inch High-quality memory foam is used to provide good support for you while ensuring the softness of pack and play mattress pad, making you feel like sleeping in a bed at home. The soft and breathable bamboo fiber bed cover is friendly to the skin and keeps breathable and comfortable all night.DETACHABLE AND MACHINE-WASHABLE COVER: The cover comes with an L-shaped zipper, which is easy to disassemble and easy to clean, ensuring that you sleeps on a clean and comfortable trend pack and play mattress every time.WATERPROOF & NON-SLIP: The cover waterproof inner liner protects the sponge from accidents (urine leakage and spit-up), you never have to worry about accidents and keep the play yard mattress clean. The non-slip bottom ensures that pack and play mattress stays in place so child feels safe even if your child rolls or plays on the mattress.