Bausch + Lomb PureVision contact lenses are the first lenses made using our unique AerGel material, delivering exceptional vision, with outstanding comfort and health. With PureVision lenses you'll experience life with visual clarity and comfort that fits the demands of your lifestyle. AerGel makes PureVision lenses exceptionally healthy. They allow natural levels of oxygen to reach your eyes, and resist protein buildup – your eyes stay comfortable all day long and well into the night. Exceptional vision with high-definition aspheric optical design , Designed to provide 30 days of excellent vision and comfort – easy to remember to replace them once a month. Comfort-enhancing AerGel material repels debris and stays moist all day, allows natural levels of oxygen for healthy, white eyes.