Nature's Miracle Odor Control Litter Box Filter

The NATURES MIRACLE Odor Control Charcoal Filters fit perfectly within Natures Miracle litter boxes to prevent the spread and general unpleasantness of your cats most difficult odors. Filters can be cut along template lines to fit any sized litter box and work for up to three months to absorb and lock-in tough cat litter box odors. For maximum freshness, dispose of and replace filters every three weeks. Package contains 2 charcoal filters.