The air quality index is off the chart right now. via Environment Canada weather.gc.ca/airquality/pages/abaq-002_e.html Short URL - tr.ee/yycair Properly fitted N95 masks filter out at least 95% of airborne particles larger than 0.3 microns - including wildfire smoke particles, which are around 2.5 microns in size. They won't do anything to prevent the smoke smell but the little floating ashes won't end up in your lungs. #Calgary #air #Alberta #abstorm #weather #airquality #abfire