Nike 7in Challenge Shorts feature an elasticated waist with a drawstring fastening as well as vented side panels for breathability. Key features include an elasticated waist, drawstring fastening, two slide pockets, vented panels, pant lining, Dri-Fit technology, and Nike branding. Machine washable. Body: 100 percent polyester, Mesh: 100 percent polyester, Brief: 100 percent polyester.