The Bobster GXR Sunglasses-Matte Black Frame With Smoked Blue Mirror Lens features a wrap around polycarbonate frame. Detachable strap allows use as a sunglass with the extra security of knowing they will remain in place. The anti-fog polycarbonate lenses are available in smoked, amber, clear, or blue mirror smoked. Closed cell foam adjusts to facial contours allowing the optimal amount of air flow. The GXR are 100% UV protection. Comes with attachable strap and microfiber pouch. GXR frames also float in water.