Prepare yourself for physical activity and prevent injuries with the Under Armour Boy's Pennant Warm Up Jacket. Designed to stimulate blood flow to the muscles and regulate body temperature, the Pennant Warm Up Jacket features double knit fabric with a smooth face and soft inner that traps body warmth.Double knit fabric with a smooth face and soft inner to trap warmthMoisture-wicking material draws sweat away from your skinCovered elastic waistband with external drawcord (plastic tip)Full zipper design makes layering easy before gamesSide hand pockets for convenient storageMaterial: Polyester