100% Cotton.Pull On closure.ONE SIZE: Hat circumference 18 - 20, one size with good stretch, it is recommended for baby boys and girls ages 2 to 5..SOFT & COZY: The baby beanie is made of ultra soft cotton, which is breathable and comfortable for babies to wear, providing babies more warmth in cold weather..ULTRA WARM FOR COLD DAYS: Double-layer baby beanie with thickened cotton lining is super windproof in winter, which makes babies feel very warm and accompanies them through the cold weather..ADORABLE BEANIE: This baby beanie is designed with lovely reindeer horn, which will make little baby look super cute with any winter outfit Perfect for going out for a walk, sunbathe in the park, photography shoots, birthday party and more..NICE GIFT CHOICE: This cute baby beanie is a warm gift for your little one on Christmas, baby shower, birthday, christening and etc.