Scent-A-Way Bio-Strike Odor Control Spray is a patented formula thatis 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 attackodors, while continuing to fight and prevent odors even after application. A third party lab tested theScent-A-Way Bio-Strike Spray formula against leading competitors in the hunting scent control market and found Bio-Strike to be 2Xas 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.Available in 12 oz, 24 oz and 32 oz spray bottles. 2X as effective as the 2nd most effective competitors formula Uses silver Nanoshield technology to increase molecular surface area for increased odor elimination 99.99% effective at destroying actual,not replicatedhuman odor Odorless (also available with Fresh Earth cover scent) Patented