Liquefies & loosens crusted or accumulated mucus. Helps restore moisture to dry or congested nasal passages associated w/ cold, runny nose, allergies, dry air from cold weather or airplane flights, dust, pollutants, overuse of nasal decongestants/nasal sterile spray, steroid nasal spray, post-nasal drip, epistaxis, rebound sinus reactions from drugs & smog. Relief of nasal congestion due to dry, irritated, crusty or inflamed nasal passages, low humidity, heat, environmental factors & air travel.