100% Cotton THE WORLD OF ERIC CARLE - We have teamed up with The World of Eric Carle to offer a new full cover KinderSheet design containing beloved characters from Eric Carle's most popular books, including "Alphabet and Numbers" MACHINE WASHABLE - This Original KinderMat Full Cover Sheet is machine washable making sure you have a clean and sanitary rest experience 100% SOFT FLANNEL COTTON - The Original KinderSheet Full Covers are made from ultra soft 100% cotton providing for long lasting comfort FITS REGULAR SIZED KINDERMATS - this full cover sheet is 47 inches long by 22 inches wide and fits KinderMats from 5/8 inch thick to 2 inches thick (compatible with Basic Kindermats, Jr. Daydreamer, and Toddler) CERTIFIED AND SAFE - this Original KinderMat Full Cover Sheet is KINDERGREEN CERTIFIED meeting the highest levels of regulatory safety standards and compliance with international ethical supplier guidelines Eric Carle Sheets