Scent-A-Way Bio-Strike Odor Control Spray is a patented formula that is third-party lab proven to be twice as effective as any other hunting scent elimination formula available! Scent-A-Way Bio-Strike uses Nanoshield technology to increase molecular surface area for increased odor elimination efficiency. Atomized molecules attack odors, while continuing to fight and prevent odors even after application. A third party lab tested the Scent-A-Way Bio-Strike Spray formula against leading competitors in the hunting scent control market and found Bio-Strike to be 2X as effective as the 2nd most effective competiting formula. As the third step (Field) of the 3-step Scent Control System, Scent-A-Way Field Spray is a must for any big game hunter. Perfect for whitetail deer, mule deer, elk, moose, caribou, and predator hunters!