Staying cool on your run in warm weather is a must. The Nike Run Division Pinnacle Tank combines runner-informed ventilation with lightweight fabric, courtesy of the Advanced Running Concepts (ARC) team. The result is a tank that you can wear for a workout or for leisure. All-Day Functionality The Run Division Collection brings you gear for any part of your day. Each piece uses runner insights gathered by our Advanced Running Concepts team (ARC). Ventilated and light, these products can be packed away when not in use. They have materials and reflective design elements that create an ensemble you can wear for work and workouts. Runner-Informed Cooling Nike’s ARC team worked with athletes from around the world to learn where their bodies heat up the most. Using that data, we placed perforations at the front for cooling with every step. Made to Move Ultra-lightweight fabric at the back is made from stretch-woven material to help you move freely. Easy Storage The tank can be packed into a small, mesh pocket on the back when you need to layer down.