360 Degree triple layer filtration allows for maximum intake. Each filter uses RFID tagging and comes with its own unique ID. It is a true HEPA Filter with filtration efficiency of 99.97% for particle size up to 0.3 microns. The primary filter ensures large particles are filtered out. The activated carbon filter removes dust, odours and other respirable particles. Filter replacement is made conveniently easy and can be changed in 10 seconds.