Opti-Free Express Lasting Comfort Formula provides lasting comfort with the convenience of a no rub solution. It is also effective at cleaning, disinfecting and storing all types of soft contact lenses, including silicone hydrogels. Opti-Free Express features a unique cleaning formula that provides triple action cleaning for your contact lenses. This formula not only allows your lenses to clean and condition themselves while in the case - it also helps keep contacts clean throughout the day, by retaining moisture and preventing protein buildup.