UA RUSH is an infrared technology that reflects your body's energy to help you work harder and regenerate faster. UA Storm technology repels water without sacrificing breathability. Lightweight, matte stretch fabric combined with durable fabric with a glossy surface is durable but breathable. Mesh inner lining for added breathability. Practical front 1/2 zipper for easier on/off. Large front pocket with flap. Adjustment with the drawstring at the hem. Developed in partnership with Celliant.