Olbas oil is a mixture of essential pure plant oils for relief of bronchial and nasal congestion and hay fever by inhalation, and for symptomatic relief of muscular pain by application to the skin. For a really intense olbas experience, put a few drops of olbas oil in a bowl of hot water, lean over it and cover your head with a towel. It’s enough to clear even the most stubborn of blocked noses. And there’s more to olbas oil than powerful decongestant vapors.