Babyville Boutique Package PUL Fabric, Cowboy and Robots Tested and proven to be durable and safe for baby, will not separate, has a nice soft hand The waterproof surface can be easily wiped clean with a wet cloth. 83% Polyester/15% Polyurethane/2% Agglutinant Machine Washable and Dryable After sewing - seal needle holes in PUL by placing in dryer on high heat for 20 minutes. Use good quality polyester thread for sewing seams and trim to deter wicking of moisture from diaper.