The Wildlife Research Center Scent Killer Combo includes a 24 oz spray bottle and a 24 oz bottle. This formula eliminates human odor and a heavy application of this spray can keep working for days. Features99% effective at stopping replicated human odor in testing at Rutgers UniversityEven more effective than Original Scent KillerHighly effective on a wide variety of odorsContinues to work for days after dryingWhen fully treated, your hunting clothes can effectively become a high powered scent elimination suit