The New TOTAL30 for Astigmatism are monthly replacement contact lenses by Alcon. They incorporate Water Gradient Technology, which allows for nearly 100% water at the surface. This creates a gentle cushion of moisture to keep your lenses comfortable all month long. CELLIGENT® Technology creates a protective layer that mimics the eye’s natural surface in order to help resist deposits and bacteria. They are designed to be worn daily and then cleaned and disinfected each night for up to 30 days.