Dead Down Wind’s ScentPrevent™ Nanozyme™ technology attacks and destroys a broad spectrum of odors 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 odor molecules before they can attach to skin or clothing! Enzyme ScentPrevent™ additive breaks down odors at the molecular level to disguise them even in the slightest breeze. Easy to carry in the field. Size: 22-grams.