The Vaportek S.O.S. Cartridge is for use in the Vaportek Optimum 4000, Restorator, and Restorator DUO. This 150 gram cartridge is ideal for controlling a broad spectrum of odors, especially odors associated with smoke. The S.O.S. (Smoke Odor Solutions) Cartridge contains a Cinnamon essential oil blend to tackle tough smoke odor and other applications. The essential oils are contained within a membrane. The oils "sweat" through the membrane pores and are dispersed into the air as a dry vapor with the assistance of air movers or natural air current.