Medical device CE 0546, class IIa. Sterile hypertonic seawater solution, with a decongestant action on the nasal mucosa and fluidifying the mucus. Indicated for cleaning the nasal cavities of infants and children in the course of colds and in particular for the decongestion of the mucous membranes in the acute phases of allergic rhinitis, sinusitis and rhinosinusitis.