Simplicity Symmetry replacement filter # SSF-2 / # SSF2. 2 filters in a package.

Fits Simplicity Symmetry Deluxe and Standard upright vacuum cleaners, including the SYMNT, SYMCL, and SYMD series.

Genuine Simplicity vacuum filters.

Electrostatic Filtration
A second popular form of filtration on the market is electrostatic filtration. Electrostatic filtration is a super-efficient medium designed for high airflow performance with a unique quality that attracts dust particles.

Air flowing through the media creates and sustains an electromagnetic charge. This attracts fine dust particles. The result is a high-performing filtration technology ideally suited for high airflow appliances like vacuum cleaners. The most popular brand of electrostatic media is Filtrete™ by 3M. Filtrete™ electrostatic media was originally developed for hospital incubators and respirators. It has since broadened to a wide line of products requiring microfiltration performance.

The 3M company has now partnered with the American Lung Association through the Health House project to promote awareness of and solutions to the problem of poor indoor air quality. For households where occupants suffer from allergic reactions to pollen, dust mites, and tobacco smoke or for those demanding a cleaner indoor environment, it is highly recommended that a vacuum cleaner purchase feature either of these technologies.

Consumer Reports has tested vacuum cleaners with both types of technologies and has concluded both offer the same "excellent" ratings compared to vacuum cleaners without HEPA or electrostatic filtration.