Dyson Pure Cool Link Tower WiFi-Enabled Air Purifier (White/Silver) The Dyson Pure Cool Link air purifier automatically removes 99.95% of allergens and pollutants as small as 0.1 microns. Dyson purifiers powerfully project and circulate purified air throughout the room with Air Multiplier™ technology. The 360 degree, vacuum-sealed Glass HEPA filter removes indoor air pollutants while a second layer of tris-coated activated carbon captures household odors and potentially harmful toxins. Intelligent purification automatically monitors, reacts and purifies - then reports the air quality data to your Dyson link app, so you can remotely control your environment. Easy filter change with notification on app when the filter needs replacement.