Quality imported printed PUL laminated on the inside or "wrong" side of the fabric. Machine wash warm water in detergent suitable for diapers. Only use hot water periodically for extra sanitation. Limit bleach to occasional use to avoid fading or breakdown of PUL. Do not use fabric softeners or other additives. Line dry or tumble dry on low heat. The waterproof surface can easily be wiped clean using a wet cloth.