Nike Team Velocity 2.0 Practice Jersey - Men's This practice jersey features next-level benefits to offer a gameday feel. Updated fit, mesh insets under the arm for breathability. Double-layer yoke for durability. Inset upper side panel with four-way stretch for more lock down through the chest. Colors: 100% nylon. White: 100% polyester. PANEL: Colors/white: 86% nylon/14% spandex. Imported.