Removable, interchangeable, machine washable cover for your MOmarsh Versa-Vest. Best Uses: Best for hunting in freezing conditions. The GORE OPTIFADE Concealment Timber pattern takes into account how ducks, geese and other waterfowl see. Rather than mimicry patterns that make the garment look like something, the Waterfowl digital concealment pattern is intended is to make the garment appear to be "nothing" to the animal.