MTL (Mouth-to-Lung): Similar to traditional cigarette smoking, where the user first draws vapor into the mouth before inhaling it into the lungs.
DTL (Direct-to-Lung): The vapor is inhaled directly into the lungs, similar to deep breathing, typically resulting in a larger vapor intake.
MTL devices produce less vapor, suitable for those who prefer a mild vaping experience.
DTL devices produce large clouds of vapor, preferred by those who enjoy strong throat hits and intense vaping.