Dead Down Wind’s ScentPrevent Nanozyme technology attacks and destroys a broad spectrum of odours at the molecular level. Human scents, gas, smoke and other potential contaminants capable of spoiling a hunt can’t stand up to this enzyme scent-prevention defense. In fact, Nanozyme destroys odour molecules before they can attach to skin or clothing. Enzyme ScentPrevent additive breaks down odours at the molecular level to disguise them even in the slightest breeze. Size: 22 grams.