The key aim when treating nasal congestion is not to dry the mucus, but to make it thinner, less sticky, and easier to move. Fess Nasal Spray helps you breathe easier by thinning nasal mucus and moisturising dry nasal passages. By clearing the nasal passages of excess mucus, Fess promotes mucociliary flow. You can use Fess for effective colds and flu relief - even when you're pregnant, on medication, or just sick of feeling blocked up. Because Fess is a non-medicated alkaline buffered saline spray, you can use it as frequently as you like. It clears and soothes dry nasal passages, washes away the germs that cause colds, naturally thins mucus, so it flows away more easily, and stimulates the nose's natural defence mechanism.