UA Storm technology repels water without compromising breathability. Lightweight, durable stretch fabric for mobility and comfort. The ColdGear infrared lining uses a soft, thermally conductive inner layer that absorbs and retains body heat. 4-Way Stretch technology allows for better movement in every direction. Extremely comfortable elastic waistband for perfect fit. Design with 5 pockets and a functional fly. It uses a fluorine-free water-repellent treatment.