Because your eyes are so important. Active Ingredients: Sterile Aqueous Buffered Slightly Hypertonic Solution Containing: Cationic Cellulose Derivative Polymer; Polyvinyl Alcohol; Hydroxyethyl Cellulose; Preservatives: Chlorhexidine Gluconate (0.006%); Edetate Disodium (0.05%) Uses: Boston Rewetting Drops help you keep your lenses comfortable by coating the lens surface and restoring the natural tear layer, allowing for longer, more comfortable wearing time. Refresh your lenses quickly and easily anytime, for all-day comfort. Soothes your eyes. Moisturizes for greater comfort. Removes particles. Helps remove debris.