Trusted by the most demanding anglers, the Smith Guides Choice Bifocal Polarized Sunglasses make it easy to go from tying a fly to casting to a distant pool without skipping a beat. Bifocal lenses mean you don't have to switch back and forth between your shades and your glasses, and they're polarized to eliminate glare so that no fish can escape your gaze. Choose between 2. 0 or 2. 5 magnification options either way you get a 25mm wide magnifying segment that helps you see up close objects without interfering with your long range vision. The Evolve frame is lightweight, yet sturdy, and is partially made with plant based materials to reduce the use of fossil fuels in manufacturing. An eight base curve offers ample coverage from the sun, and a hydrophobic coating keeps your lenses from getting smudged. Proposition 65 Warning for California Consumers: This product contains chemicals known to the State of California to cause cancer andor birth defects or other reproductive harm.