New Air Optix®Plus HydraGlyde®contact lenses are monthly lenses designed specifically to retain long-lasting lens surface moisture and shield against irritating deposits. These lenses employ SmartShield Technology, a protective layer of moisture. This means that your contact lenses will remain moist and comfortable throughout all four weeks of wear. These soft contact lenses are breathable, allowing for more oxygen to reach the eye compared to traditional soft contact lenses. When you are replacing your lenses on a monthly schedule, it is easy to remember when to start using new lenses.