It cools the smoke so there is no problem in the throat, it does not alter the taste and filters the smoke... as much as it filters it. With its use, you don't wet the cigarette. An additional benefit is that with rolled cigarettes, we use less tobacco by smoking less. I change it every four cigarettes.

It is not worth it at this price because it is only for one use and not for more as they claim, since it smells after the first use and does not come off the paper