Phat Charcoal Fiber Odor Filter, 6"The Phat Charcoal Fiber Odor filter is a highly efficient filter on the market. Built with greenhouse charcoal fiber, it comes with the latest 3 layer tightly woven fiber technology. It helps to remove gases, particulate matter, and odors from the growing room, growing tent, or any other similar area. It has an increased capacity which makes it usable with fans with a high CFM rating. It is perfect for complimentary odor control, scrubbing operations,