SheetWorld oval crib sheets for the Stokke Sleepi crib is made of the highest quality 100% cotton woven material that is soft, breathable, hypoallergenic, and most practical for all year round use. Made in USA! Fits mattresses 26 x 47 100% Cotton woven Elastic All Around For Secure Fit Machine Washable & Dryable Made In USA *Note: For stores in the USA, SheetWorld only sells to brick & mortar stores