These daily lenses are daily replaceable and offer every day optimal comfort. These daily lenses from Dailies contain a hydrating element thanks to the patented production process called Light Stream Technology. Focus DAILIES All Day Comfort contains Polyvinyl alcohol (PVA), a wetting component that is often used in comfort droplets. With each blinking stroke, PVA is gradually released from the lens, and this throughout the day. This PVA ensures that you also enjoy a very comfortable feeling at the end of the day.