The compounds in our secret Nose Jammer formula are emitted by trees, shrubs, and grasses. Delivering these natural aromatic compounds at concentrated levels effectively jams up big game animals sense of smell without alarm. See what hunting is like when big game animals can`t smell. Specifications and Features: The compounds in our secret Nose Jammer formula are emitted by trees, shrubs, & grasses Delivering these natural aromatic compounds at concentrated levels effectively jams up big game animals sense of smell without alarm. 8 oz aerosol