Dyson ‘s cyclone is the advanced filtration of the entire appliance. It consists of two components: a stainless steel filter (with more than 70,000 circular holes) that filters out all particles over 250 micrometres in size, and 14 concentric cyclones that generate a force of more than 79,000G, throwing microscopic particles (such as pollen and even bacteria) into the container without clogging the filter, so there is no loss of suction power. In addition, an airtight seal around the cyclone unit and a rubber gasket around the advanced filter, makes the entire system completely airtight, preventing dust, allergens and bacteria from escaping back into the air.