Cotton. Ultra soft and breathable fabric, warm and skin-friendly, no any harm to baby's tender skin. Basic romper, Embroidered Rainbow Pattern, Suspender strap, Ribbed knit, Criss cross back. Sweet style, your baby will be adorable and pretty wearing this jumpsuit. Snap closure at bottom, easy to put on and take off. Perfect for taking pictures, or just bringing smiles to everyone around, which is a lovely romper for baby as a daily gift. Suitable for casual, home wear, play wear, baby photos, family gathering, holiday, church, birthday, baptism.