Hi Gene, this is Krystal with Dyson. Thank you for your interest in the Dyson Pure Hot + Cool Link. This is a glass media filter made from constructed borosilicate microfibers, pleated 333 times. The Dyson filter is able to capture 99.97%of allergens and pollutants as small as 0.3 microns from the air. It has an increased layer of activated carbon granules compared to the previous generation, to capture odors and potentially harmful VOCs.
Dyson Customer Service