Denicotea Cigarette Filters 9mm - 10 Pack

Being able to see the filter turn dark brown makes it easy to know when to swap—no second-guessing. Each one easily lasts me the advertised 15 cigarettes, cutting down the harshness noticeably.

I was skeptical at first, but after smoking about a dozen cigarettes with one filter, it was noticeably darker—so the tar absorption is legit. The 9mm size fits perfectly in my holder, and the pack of 10 should last me a while.

They work as described—the silica gel does noticeably darken after about a dozen smokes, so you can tell when it's time for a swap. I just wish each filter lasted a bit longer, but for the price it's a solid buy.