Under Armour UA Storm Session Run Half-Zip Jacket This jacket will keep you comfortable all run long. It's insulated in the front to trap warmth when you first go out but ventilated, so you don't overheat. Stay dry and in control in the Under Armour Storm Session Jacket. Durable, lightweight, stretch-woven fabric moves with your body for freedom of movement and long-lasting comfort. UA Storm technology repels water without sacrificing breathability, keeping you protected from the elements without overheating. The durable woven fabric on the front of the jacket is combined with stretch-woven shoulders and upper back for mobility and comfort for all-day use. Keeping you warm when the temperatures start to drop is a strategic 60g of synthetic insulation to the front body for lightweight warmth with no excess bulk. The insulation works to trap heat created by movement in pockets of air, keeping you warm as you train. The jacket has a Half zip design with a breathable mesh