The P'8478 sunglasses are the first frame to provide an easy, fast, interchangeable lens mechanism. With a quick release the teardrop-shaped lenses can be replaced to adjust various lighting conditions and styles. The frame is manufactured from high quality lightweight titanium. The lenses are made of scratch-resistant, unbreakable polycarbonate and offers top UV protection. A second pair of replacement lenses (different color) are included. To see the standard and replacement lens color, please choose frame color and size. Material titanium Glass brown (standard) light blue/silver mirrored (replacement)