The makers of Nose Jammer say it "jams big game animal's ability to smell'. Formulated from all natural compounds that are emitted by trees, shrubs and grasses, Nose Jammer concentrates those natural aromatics at levels that overpowers the sense of smell of big game animals, masking human scent without causing any alarm. Nose Jammer deodorant goes on clear, and won't clump up. No aluminum or toxins.