Improved hydration for more comfortable use OPTI-FREE ® puremoist ® is the only multi-purpose disinfecting solution containing HydraGlyde® Moisture Matrix which maintains lens moisture for 16 hours and provides you with all-day comfort. Wet lenses for 16 hours. Removes lipid and protein deposits daily. For all silicone hydrogel lenses and soft contact lenses . OPTI FREE Pure Moist contains Exclusive HydraGlyde Moisture Matrix Hydration Technology. This is responsible for binding and retaining moisture. It is integrated on and into the surface of the lens . It creates a layer of moisture and facilitates hydration from morning to night. It has a strong action against Bacteria, Fungi and Acanthamoeba Cysts