ClevaMama sheets are made from beautifully soft cotton jersey. Designed to fit a ClevaMama® crib mattress, our cotton sheets are machine washable (40°) and dryer safe and require no ironing. As with all ClevaMama products, quality is at the heart of each product we make, and these sheets are no different. Designed to help keep your baby more comfortable in all seasons. Help everyone sleep comfortably and peacefully throughout the night. Soft fabric, does not cause allergic reactions. Well ventilated (not waterproof) 1 pack has 2 pieces. Dimensions: Dimensions: 44 cm x 90 cm