Upgrade your Stokke Sleepi V3 (sold separately) with this mattress that provides 360 degrees of airflow.What it does: Featuring a soft layer of certified organic-cotton batting at its core and food-grade polyethylene waterproofing, this mattress is easy to clean when accidents happen.Additional features: It also comes equipped with a breathable cover featuring a soft, organic-cotton surface and a 3-dimensional polyester lattice structure that creates a breathable space under your little one to maximize airflow.Includes: Mattress and removable cover.Sizing information: 27.5" x 53.7" x 3". Compatible with Stokke Sleepi Bed V3 (sold separately) Removable mattress cover is machine wash, tumble dry Cotton with polyethylene foam pad Assembled in the USA from US and imported materials