Very light stretch fabric for absolutely unrestricted movement. The inner mesh lining helps wick away moisture, and the laser perforation increases breathability. The 4-Way Stretch technology allows for better movement in every direction. The material wicks away sweat and dries very quickly. An improved expandable center pocket on the back is water-resistant to keep your phone safe. Elastic waistband with internal drawcord. Secure zippered side pocket. Reflective details for running in low light. Leg length: 12.7 cm.