Free Nose® Hypertonic Seawater Nasal Spray is a medical device suitable for children and adults to treat nasopharyngeal mucosal infections, nasal congestion, sinus infections, and snoring caused by dry mucous membranes. The hypertonic nasal spray removes excess fluid from the nasal mucosa—the membrane cells—based on the osmotic effect of the hypertonic solution. In addition to mechanical cleansing and decongestion of the upper respiratory tract, this osmotic effect helps reduce mucosal swelling. Proper use of Free Nose® Seawater in daily nasal hygiene provides therapeutic support for common conditions such as nasopharyngitis, obstructive rhinitis and sinusitis, dry nose, hoarseness due to dry mucous membranes, and as an adjunct to ENT and pediatric treatments. Free Nose® Seawater retains the specific vital properties of natural seawater. Free Nose® Seawater comes from the Bay of Cancale in Brittany, renowned for its exceptional water quality. The Bay of Cancale is characterized by exceptionally high tides (12 m) and strong currents that prevent water pollution. This unique combination ensures that the water is constantly self-cleaning and remarkably pure. Sampling is carried out automatically when water quality is optimal (after high tide). The sampling area is classified as Class A and is subject to continuous monitoring and health controls (microbiological, chemical contamination, phytoplankton, pH, etc.).