Porsche Design sunglasses with interchangeable lenses. Extremely light titanium as well as impact-resistant polycarbonate lenses. Description: The iconic Porsche Design P´8478 sunglasses were the first in the world to have an interchangeable lens system. The teardrop base 6 curved lenses in the sunglasses can be easily changed with a quick-lock system that you turn to unlock and then replace with another interchangeable lens for different light conditions. Extremely lightweight titanium and highly resistant. ** Comes with an additional pair of metallic interchangeable lenses Frame Color: (DG) Black Matt, Lens Grey Blue Lens Color: Grey Blue, Silver Mirrored