Sunlight-cured tobacco, Bastam, Iran Curing and subsequent ageing allow for with the slow oxidation and degradation of carotenoids in tobacco leaf. This produces specific compounds in the tobacco leaves and gives a sweet hay, tea, rose oil, or fruity aromatic flavor that contributes to the "smoothness" of your smoke. https://dotcom-directory.com/listings13118827/the-fact-about-smoke-that-no-one-is-suggesting