The Stokke Nighti Bed Fitted Sheet is made to fit the Nighti Bed mattress, giving your child a snug, smooth sleep surface that stays in place through the night. It is made with certified organic cotton under the Organic Content Standard 100 (OCS 100), so it is soft and gentle on delicate skin. The fitted design makes it quick to put on and take off, which helps with night-time changes. For best results, follow the care instructions on the label.