humidors are kept at 70-72% humidity.. it just so happens that that is the relative humidity in cuba all the time. that is one of the factors that makes cuban cigars so desirable, but the main reason is that the alkalinity of the soil in cuba just so happens to be perfect for growing very tasty tobacco. as of late though, i do think that the "cuban" label is what makes them desirable to the pretentious cigar smokers.