Airborne is one of the many manuka honey companies that does not pay the trademark fee to put a "UMF" number on their labels. Since they do not pay an expensive trademark fee, you may notice we are able to sell their honey for much less than other manuka honeys out there! However, Airborne does use a grading system for the bee pollen count that is in all of their jars of honey. You can find that information printed on the side of every jar for each batch to ensure that it is actually manuka honey. Airborne does not use the UMF trademark or promote their honeys using this system as they have found significant variance with it. They have measured their manuka honey for Peroxide Activity (a highly effective antibacterial agent used by white blood cells as a mechanism for killing bacteria) and found that they are consistently very high compared to other honeys.