Constructed from lightweight breathable material. Hat is rated UPF (ultraviolet Protection Factor)50+ the highest possible rating. Many extras include wide brim and extra-long nape for extra protection. Adjustable chin strap and head strap for a one size fits all hat. Safety compliant for children 0 months+, designed for newborns up through 5 years old. Sewn in name tag and easy wash and care. Perfect for summer, beach pool, park, gift and travel. Illustrated with iconic Beatles Yellow Submarines and Bandmate portals officially licensed