Using a gentle, ultra-fine mist made from a precise blend of hydrating salts, FEND strengthens your upper airways' natural ability to clean the air you breathe. Over the last twenty years, founder David Edwards and his collaborators at MIT, Harvard, the NIH and other institutions have shown that topical upper airway hydration can be achieved by targeting calcium and magnesium salts to the upper airways with benefits lasting up to six hours following brief nasal inhalation. Sensory Cloud (the parent company of Fend) is a Boston-Based health tech company that aims to improve human lives one breath at a time.