Dead Down Wind’s bio-engineered process known as ESP has an enzyme that targets human bacteria – the source of human odor that actually prevents odor causing bacteria from forming, so you can maintain a zero scent environment. Dead Down Wind has incorporated 2 great technologies into the manufacturing process to further enhance scent protection. Nano-Technology transforms particles to the atomic level, so the enzymes operate far more efficiently. Fusion Technology is a patentable manufacturing process that adheres 2 or more foreign particles for significantly improved performance, efficiency, and speed of action. 2-1/4 oz. antiperspirant.