NIKE Men's 7" Phenom 2-in-1 Running Shorts Body: 100% Polyester - Lining: 84% Polyester/16% Spandex Built-in Nike Pro shorts deliver support All-over laser perforations enhance breathability Dri-FIT fabric helps keep you dry and comfortable Elastic waistband with pocket for small-item storage Reflective elements remain visible in low light, Vented hem for full range of motion