If the weather doesn't match your running plan, don't worry, but use the Under Armour waterproof jacket, which is also incredibly light and breathable. Which means you can run without worrying about the weather forecast. UA Storm technology repels water without sacrificing breathability windproof construction protects you from the elements lightweight and super durable woven fabric side pockets with zippers Rear vents for greater breathability Reflective details for low-light running