Comprises Of 100% Organic Cotton Certified By Gots - The Global Organic Textile Standard. Cotton Is A Soft, Natural Material That Breathes, Absorbs Moisture And Feels Comfortable Against Your Skin. Cotton Is A Soft And Easy-Care Natural Material That You Can Machine Wash. Fits Mattresses With A Thickness Up To 26 Cm Since The Fitted Sheet Has Elastic Edging All Around.