Baby is sure to have sweet dreams on this fitted crib sheet made of soft cotton percale for your Sleepi Mattress (sold separately). Compatible with Stokke Sleepi Bed V3 and Stokke Sleepi Bed Extension V3 (both sold separately) 100% cotton Machine wash, tumble dry Imported OEKO-TEX?certified materials free of harmful substances This product meets Nordstrom Sustainably Sourced Materials criteria: contains at least 30% sustainably sourced materials