The Shawn swimming trunks are made of 100% polyester. This makes the swimming trunks feel soft and dry quickly when your child comes out of the water. The Shawn swimming trunks also have an elastic waistband with an extra drawstring for the ideal fit and also a mesh inner panty. In addition, there is a UPF50+ protection incorporated in the fabric, which blocks up to 98% of UV rays and protects your child better against sunburn. One thing is certain, with the Shawn swimming trunks your child will always have an advantage!