Clinitas Soothe is a gentle preservative-free eye drop in easy to use daily re-sealable droppers. Once opened, the cap can be inverted to re-seal the dropper for use throughout the day up to 12 hours. It contains the highest concentration of sodium hyaluronate (0.40% - a naturally occurring product in the eye) available in an eye drop. Each dropper contains approximately 10-12 drops and comes in packs of 20 reusable vials, making Clinitas Soothe an economical and very convenient eye drop.