Oiled Whipcord A2 Deck Jacket - Black IHM-45-BLKIHM 45 BLK An oiled version of Iron Heart's A2 deck jacket, designed to enhance water resistance. Due to the nature of whipcord and its resistance to absorption, the heavy oiling increases the fabrics weight from the standard 12oz to approximately 14oz. For this seasons models, Iron Heart updated the oiling process in an effort to find a more eco friendly method. Previously, they used fluorine in the process , a toxic chemical that poses serious