PolyesterButton closureBoth hand washing and machine washingKids pajama sets is made of satin with some stretch touch, silky-smooth, very softly and comfy. Lightweight and skin-friendly material care for children both girls and boys.FEATURES - Classic and cute two-piece pajamas set.Long sleeve notch collar button-down top and Elastic waist pants.Simple design with chest pocket.Pure colors for many choices.and wear them for all seasons. Elastic waist pants, making your kids feel relax. Classic notch collar,chest pocket lend sophisticated detail.SIZE - More measurements please refer to the size chart on before ordering.Present - The children satin sleepwear sets is perfect for sleeping, bathing and lounging indoor and outdoor. Great presents for daughter, son, granddaughter, grandson, close friends, ect as birthday gift other present.WASHING TIPS - The boys girls nightwears are suitable for both hand washing and machine washing. Hand wash gently can slow down the process of wear down or stiffen up; After cleaning, hang it to dry and do not expose in the sun; Can be folding storage or hanging storage.