Highest purity and hygiene: High-performance hygiene filtration. Only original accessories are perfectly tailored to your device and impress with their fit and durability. Siemens vacuum cleaner accessories are recommended for allergy sufferers. It cleans the exhaust air, making it cleaner than normal room air. The filter removes even the smallest particles and meets the European standard for air hygiene of HEPA class 12. It is washable, so no replacement purchase is necessary.