100% Polyester Please Click "Customize Now" to choose your size, enter your name and number, you will make Personalized Baby Clothes. 100% Polyester. It's time for the whole family to cheer on the team! The Baby Clothes feature a variety of designs and patterns that show off baby’s team pride. Soft and skin-friendly, comfortable and breathable, micro-elastic, comfortable to wear, loose crotch movement is convenient, button design, easy to change the diaper. Your baby will stay comfy throughout the entire game and day. Machine wash.