The Nike Power Speed Flash Men's Running Tights offer exceptional support at your fastest speeds with a compressive fit and reflective graphics designed for locked-in comfort from first mile to last. Support In Motion Nike Power fabric provides optimal stretch and support without sacrificing freedom of movement. Targeted Reflectivity Screen-printed graphics wrap around your quads and calves to help reduce muscle vibration. The graphics are also reflective to help you stand out in low-light conditions. Secure Storage A zipped, lined back pocket provides secure and convenient storage that keeps small items dry.