Long lasting polyester/spandex blend for durability, reduced water absorption and speed. Chlorine resistant. This kids jammer is sleek, stylish and form fitting with a soft feel. "V" panel crotch for increased comfort and a sportier look. Flat locked seams and a flat drawstring lie flatter and closer to the body to help speed water flow over the swimmer. The Tiun swim jammer is a quality swimsuit for boys that will last. Over extended use, these swim shorts will not become baggy or sag.