Keeps you protected from the rain and warm with strategic insulation, but is light and stretchy so it won't slow you down. UA Storm technology repels water without sacrificing breathability Durable woven front body fabric paired with stretch-woven shoulders & upper back for mobility & comfort Strategic 60g synthetic insulation on the front body for lightweight warmth with no excess bulk Secure, zip hand pockets with interior media pocket Reflective details for greater visibility on low-light runs Dropped, shaped hem Uses a fluorine-free water repellent treatment Fitted: Streamlined fit that’s not too tight or too loose. UA Storm Session Run Vest