This 2-piece set is designed for warm summer days. The graphic romper is made of cotton/poly jersey that feels smooth and soft on baby's sensitive skin, with snappy tape closures at the neckline and inseam to make changing and dressing easy. The bucket hat has a built-in cotton sweatband to help keep your little one cool under the sun and the chin strap has hook-and-loop closures for a stay-put fit.