UA Storm technology repels water without compromising breathability. Windproof construction helps protect you from the elements. Durable, lightweight stretch fabric ensures better mobility and comfort. 4-Way Stretch technology allows for better movement in every direction. An improved expandable center pocket on the back is water-resistant to keep your phone safe. Soft knit waistband with internal drawstring for a secure fit. Zippers at the ankles for easy on and off. Reflective details for running in low light. Tapered leg cut.