Avaira Vitality is the evolution of the popular Avaira lens. A higher water content provides superior long-lasting comfort and vision quality. CooperVision also added Class 1 UV protection which means that these lenses block more than 90% UVA and 99% UVB rays. And, if you have been wearing Avaira lenses in the past, you can switch easily to Avaira Vitality. According to CooperVision, there is no additional 'chair time' required.