Wildlife Research 560 Scent Killer Spray Combo Pack Over 99% effective at stopping replicated human odor Odorless formula; no odor to scare your trophy buck Continues to work for days after drying When fully treated, your hunting clothes can effectively become a high powered scent elimination suit Over 99% effective at stopping replicated human odor Even more effective than the Original Scent Killer Odorless formula; no odor to scare your trophy buck Continues to work for days after drying When fully treated, your hunting clothes can effectively become a high powered scent elimination suit.