The Bosch HEPA hygiene filter has been developed for allergy sufferers. It filters 99.9% of fine dust particles, bacteria, and pollutants, preventing fine particles, bacteria, and allergens from being released back into the room with the exhaust air. The exhaust air is cleaner than the room air. It is compatible with the GL-85 In'genius, GL-80 In'genius/Perfectionist, GL-70 Ergomaxx'x, GL-50 Free'e, and GS41 series. Bosch's original accessories are perfectly tailored to the devices and impress with their durability and precise fit.