NOSONE Nasal Spray (medical device Class IIa) creates a virus-hostile environment with low pH in the nose. At the same time the nasal spray forms a protective layer on the nasal mucosa, preventing the virus from entering the mucosal membrane.The result is that cold virus is unable to multiply and unable to survive. NoSone Nasal Spray: - Helps stop the cold - Cleans the nose - Reduces swelling of the nasal mucosa - Nourishes and restores the nasal mucosa.