Sterile single-use containers. Complete relief for symptoms of dry eye. Breakthrough technology for complete and relief plus protection. No preservatives. The next step in dry eye therapy. With its unique formulation, Refresh Endura does more than wet the eye, it is the first eye drop that benefits all three layers of the tear film. Refresh Endura Lubricant Eye Drops create a soothing shield with long lasting layer of moisture for sustained relief of persistent dry eye symptoms. This unique formula of Refresh Endura appears as a light milky eye drop. It looks and feels different because it is different. Technologically advanced Refresh Endura Lubricant Eye Drops are safe to use as often as necessary and provide 24-hour comfort for dry, irritated eyes.