Nose Jammer creates a cloud around you which jams big game's ability to detect and track human odor. Nose Jammer should be sprayed on clothes, boots, tree stands, blinds and brush. When the wind swirls, critters olfactory gets jammed and they stay unalarmed. Nose Jammer Field spray. is most effective when used in conjunction with the rest of the Nose Jammer line of products. Works on all critters with a nose! Nose Jammer Field spray is in a 8oz. spray can.