Pure Cigs electronic cigarettes produce an inhalable nicotine vapor that looks, tastes, and feels like real smoke but without the nasty tar, ash, and smell of a cigarette! When you take a puff on your pure cig airflow sensors automatically activate power to the e-cigarette. Once activated the battery delivers power to the nicotine cartridge, also known as a cartomizer, which produces the vapor you inhale. The tip of your e-cigarette will light up like a real cigarette to let you know that it is working. Our high performance cartridges produce clouds of rich vapor without the hassles of a seperate "atomizer" that many older and inferior brands may require. When the cartridge has stopped producing vapor you simply replace it with a fresh one and continue smoking.