The diminution of salt particles gives rise to new properties. These include an increase in the total volume of the salt suspension, which significantly increases the surface area in which the salt comes in contact with the tissue surface. Thus, if 1 ml of liquid is turned into an aerosol spray consisting of particles 5 microns in size, this makes 15,000,000,000 particles with a total area of 12000 cm2. The chemical and physical activity of the salt particles and the trace elements in them increases, which leads to an increase in their pharmacological effect. Creating a high-dispersion aerosol spray has another key advantage. These solutions are more stable, and the particles in the spray can remain airborne for a long time without settling. They can be freely inhaled, and upon exhaling, due to their slowness to settle, some portion of them is exhaled too. When these particles settle it is an important physiological progress, as the ultimate goal of salt therapy is precisely this: the spray penetrating into certain parts of the respiratory tract. Thus aerosol particles 1 micron in size practically do not settle on the mucous membranes of the respiratory tract; particles 2–5 microns in size freely and productively settle on the walls of the alveoli, bronchioles, and secondary bronchi; particles of 5–25 microns settle in the primary or main bronchi and the trachea; and particles larger than 25–30 microns settle in the throat and the mucous membranes of the upper respiratory tract.