Rene Rofe Baby Baby Girls' 2 Piece Sundress Set with Diaper Cover Dress: 100% Cotton; Diaper Cover: 60% Cotton, 40% Polyester Imported Machine Wash Dress: 100 percent cotton, diaper cover: 60 percent cotton 40 percent polyester Rear snap neck opening Elastic waist diaper cover Tag less neck label Machine wash cold with like colors. Use only non-chlorine bleach when needed. Tumble dry low