PureVision Multi-Focal monthly contact lenses feature an innovative optical design allowing you to see clearly at all distances – near, far, and everywhere in-between. PureVision Multi-Focal lenses are made of AerGel, a unique material that lets natural levels of oxygen reach your eyes, they stay comfortable and healthy, while resisting protein and debris buildup on the lens. So comfortable, in fact, you may hardly notice you're wearing lenses at all. The lenses are also designed to resist protein and debris buildup. This means your lenses stay clean.