Wildlife Research 1572 Scent Killer Autumn Formula, 12 Fluid Ounces High-powered human odor elimination formula, blended with the scent of autumn woods and fields Very mild masking scent effect Over 99% effective at stopping replicated human odor in testing at Rutgers University Long term effectiveness; Use the complete Scent Killer System for maximum results 12 fluid ounces in a pistol grip bottle