Solar-cured tobacco, Bastam, Iran Curing and subsequent ageing permit with the gradual oxidation and degradation of carotenoids in tobacco leaf. This generates sure compounds while in the tobacco leaves and gives a sweet hay, tea, rose oil, or fruity aromatic flavor that contributes to your "smoothness" with the smoke. https://broadfar.com/oraco-pioneering-a-smokeless-future-with-innovative-nicotine-delivery/