Check the listing for details. STERIMAR SEA WATER NASAL SPRAY 100ML. Condition: New. Listed at 16.95 USD. It is a nasal spray of isotonic solution of seawater with a micro-diffusion system that optimizes its hydrating effect, helps to breathe, reducing mucus and congestion, and restores the natural balance of the mucosa. Sterimar is a seawater solution collected more than 5 meters deep and 20 km off the coast of Brittany, in the Bay of Cancale (France). The Cancale Bay area is monitored by an official body (IFREMER) from a health point of view, which certifies its constant quality on a regular basis. The water from this area is considered of a high quality, rich in trace elements and minerals, mainly due to the presence of high tides, which constantly oxygenate the water, and by the cultivation of oysters, which are responsible for filtering the water to feed of the plankton it contains.