This oversized children's 2-piece set is made from 100% cotton fabric. It's designed as a unisex t-shirt for both girls and boys. It's breathable in spring and summer, and its loose fit and short sleeves provide freedom of movement for little ones. The shorts have an elastic waistband for ease of movement and a drawstring for a comfortable fit. The shorts have two pockets. It's manufactured to 100% child safety standards. It has been passed through a metal needle detector to detect broken needles during sewing. Nickel-free accessories and non-toxic dyes have been used. Top, Bottom: 100% Cotton