About this item: Ultimate wildfire season tool: wildfire smoke with added protection against other wildfire emissions such as toxic gases, smog, and odors COMPATIBLE WITH THE ENTIRE BLUE PURE 411 AIR PURIFIER RANGE: 411 Series SmokeBlock replacement filter compatible with the entire Blue Pure 411 air purifier range including the Blue Pure 411 Auto, Blue Pure 411, Blue Pure 411+ air purifiers FILTERS BUILT TO LAST: Utilizing a 360-degree air intake and up to 4 times the filter surface area, the Blue Pure 411 Series SmokeBlock filter lasts an average of 6 months; optimize airflow and performance over time Removes even the smallest airborne particles down to 0.1 Micrometer: The particle filter removes airborne particles such as pollen, pet dander, bacteria, mold, and dust from your indoor environment. Traps household odors: In addition to wildfire emissions, the activated carbon filter also traps household odors, smoke, chemicals, and volatile organic compounds () [Product Name]: Air