Lobob Hard Contact Lens Wetting Solution is a slightly alkaline solution for use with rigid contact lenses. It is sterile in the package and contains Benzalkonium Chloride and EDTA as aseptic agents. The safety of these agents has been demonstrated by years of usage and they will kill bacteria on the lens if left in contact for an adequate period of time. It also affords lubrication for increased comfort and the combination of ingredients allows the solution to provide these good effects for a considerable time before tears dilute and wash the solution from the surface of the lens. This product is NOT FOR RGP LENSES.