AIR OPTIX NIGHT & DAY AQUA Lenses are the first silicone hydrogel soft contact lens approved by the FDA that can be worn 24 hours a day for up to 30 days and nights - even while you sleep. These revolutionary lenses are so breathable, they allow six times more oxygen through the lens than traditional soft lenses. Designed as 30 day disposable lenses, and are manufactured by Alcon, formerly CibaVision. The innovative AQUA moisture system creates comfort on contact, all day, everyday. The most oxygen through the lens of any available soft contact lens. Revolutionary lenses allow six times more oxygen to reach your eyes than ordinary contact lenses. Wearing Schedule: FDA approved for daily wear up to 30 nights continuous wear** Recommended Replacement Schedule: Monthly.