Just add water – each Pack-It makes 12 oz. of Evolve Field Spray. These feather light packets are ideal for back country or traveling hunters. Dead Down Wind's Scent Prevent Nanozyme technology attacks and eliminates 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 scent-eliminating defense. In fact, Nanozyme destroys odor molecules before they can attach to skin or clothing!