Our sweat-wicking Challenger Shorts keep it light and right with a relaxed overlayer and tight underlayer for support that helps you get the most out of your movement. We geared this one for for more than running, with a comfortable pocket that won't irritate when you move from the track to the gym. • Shorts: 100% polyester. Tight: 92% polyester/8% spandex. Tight Center Front Lining: 92% polyester/8% spandex.