Our Acceleration 8" running shorts are made from lightweight, woven, four-way stretch material that provide superior moisture wicking and breathability characteristics. These running shorts also have side mesh panels and a moisture-wicking mesh brief liner to help provide optimum breathability and support for those long morning runs. Our back zipper pocket is large enough to hold a standard iPhone 7 (or smaller). And our elastic waistband with drawcord ensure an optimum fit and hold.