Opti free pure moist multi purpose solution with hydraglyde moisture matrix hydraglyde moisture matrix is a proprietary wetting agent in opti free puremoist mpds that provides comfort and moisture from insertion to removal how it works in the lens case hydroglyde moisture matrix embeds itself on and within the lens surface to provide moist and hydrated lenses throughout hydraglyde moisture matrix provides a lubricating cushion of moisture for comfort from lens insertion to removal opti free