Evolve3 field spray, Dead Down Wind's newest enzyme technology, reduces a broader spectrum of odor molecules including human, smoke, gas, and other synthetic contaminant odors. It's the last line of defense against any alarming contaminant scent a hunter may acquire before and during the hunt. The 64-oz. container of Evolve comes with an 12-oz. sprayer bottle for easy application. For best results, use the full ScentPrevent system of laundry, body and field products.