The Dyson cyclone system provides advanced filtration throughout the entire device. It consists of two elements: a stainless steel filter and concentric cyclones that force microscopic particles (like pollen and even bacteria) into the bin without clogging the filter, ensuring no loss of suction power. Furthermore, an airtight seal around the cyclone assembly and a rubber seal around the advanced filter ensure the entire system is completely sealed, preventing dust, allergens, and bacteria from re-escaping into the air.