Smith Heyday Sunglasses - Women's Composite frame Carbonic lens non-polarized Lens width: 55 millimeters Bridge: 16 millimeters Arm: 125 millimeters Frame Color: Black Cherry Fade Lens Color: Brown Size: 55-16-125 Smith Optics Heyday Lifestyle Collection Authentic Sunglasses/Eyewear Smith Optics Lens has Tapered Lens Technology that corrects the distortion by progressively tapering the lens from the optical center towards the outer edges. Light waves are thereby delivered straight to your eye resulting in zero distortion and true optical clarity. What you see is what you get.