100% Polyester Button closure Machine Wash Easy to order, click "Customize Now" to choose baby SIZE, and enter baby NAME and NUMBER and you will make Baby Clothes. 100% polyester. Unique design, soft and skin-friendly, comfortable and breathable, micro-elastic, comfortable to wear, loose crotch movement is convenient, button design, easy to change the diaper. It's time for the whole family to cheer on the team! Your baby will stay comfy throughout the entire game and day. Machine wash.