Biotrue Multi-Purpose Solution conditions, cleans, removes protein, disinfects, rinses, stores, for soft contact lenses, including silicone hydrogel. Enhanced with HA, a moisturizer found naturally in tears Matches the pH of healthy tears to help make contacts comfortable upon insertion. Removes dirt and protein buildup and kills 99.9% of germs. Cleans, disinfects, hydrates and moisturizes for up to 20 hours.