Hypertonic solution based on seawater and hyaluronic acid is useful to protect and restore the mucous membranes of the respiratory tract of children and adults to normal physiological conditions. Ideal both for routine cleansing and as an adjuvant in the treatment of colds, sinusitis, rhinitis and pharmacological therapies. The synergistic action of seawater and hyaluronic acid helps to promote hydration of the mucous membranes and fluidification of excess mucus, thus facilitating the elimination and drainage of secretions and ensuring the cleanliness of the nasal passages. Preservative-free.