Isomar Nose Decongestant Spray is decongestant due to the salt concentration of around 3%. The salty solution compared to body fluids promotes a gentle decongestant action by osmosis and helps drainage of secretion. Hyaluronic Acid keeps the mucosa soft, hydrated and protects the mucous membrane from dehydration by reducing the risk of dryness and micro-harm inside the nasal cavity that can occur in case of severe colds, allergic rhinitis or sinusitis. It contains Hypertonic seawater (Natural saline concentration of seawater around 3%), Sodium Hyaluronate, Inert propellant gas: Nitrogen.