Hyalorunic acid's main purpose is to retain and replenish moisture. Its ability to bind immense quantities of water to the nasal mucus membrane ensures an effective and long-lasting level of hydration. It helps to soften mucus crust and buildup to facilitate easy removal. Sodium has natural antibacterial properties and helps to create a protective barrier against cold and flu viruses, making it ideal for use before travelling. Chamomile soothes the mucous membranes of the nasal passage and helps to relieve inflammation.