Fir needle essential oil — derived primarily from Abies sibirica or Abies balsamea — is rich in bornyl acetate (30-40%), camphene, and alpha-pinene, which together give it a crisp, forested aroma. These monoterpene constituents contribute to documented antimicrobial and anti-inflammatory properties.^[1] The oil is used in respiratory applications, as bornyl acetate acts as a mild bronchial antispasmodic.^[2]