The ultimate superblend of frankincense, utillizing premium grade resins from Boswellia carterii, Boswellia sacra, Boswellia papyrifera and Boswellia frereana.  This blend is very similar to a quad blend Dr. Pappas formulated a number of years ago and used by some big name brands, but now it's even deeper and richer with heavier "incensy" components due to the proprietary distillation process developed at Essential Oil University.