Review on 🌬️ Boltwin Portable HEPA Filter Air Purifier: 3-in-1 Solution with 8000mAh Battery for Smokers, Second Hand Smoke, Pets, and PM 2.5 Purification" by Beth Parker

Definitely worked as intended. My only complaint is that they can't really be washed to prolong their life and as I used an ashtray these filters were used quite a bit (they worked fantastic btw too), they clogged up pretty quickly which felt as if it would decrease sucking. For the occasional smoker or just a break or a few hours at your desk, it will likely last a little longer.