Protection Perfected By Data Nike Storm-FIT technology resists elements like wind and water to help keep you comfortable in harsh weather conditions. We used athlete data to learn where water impacts runners the most to place water-repellent and windproof fabric along the front leg and back calf. Still Breathable Knit fabric at the back of the leg adds a touch of breathability. Zippered ankles let you customize your airflow. Room For Your GEar A center-back pocket expands so you can stash your phone. An extra layer of protection helps keep it dry in wet weather. 2 additional drop-in pockets at the hips let you keep keys or a card close. More Benefits An elastic waistband with an internal/external drawcord delivers adjustable comfort. Product Details Reflective taping Not intended for use as Personal Protective Equipment (PPE) 73% polyester/27% spandex Machine wash Imported