ALKAI Men’s Helium Photochromic or Polarized Sports Sunglasses, 0.56 oz, Guaranteed Fit and Comfort, 100% UV Protection, Perfect for Fishing, Cycling, Running, Golfing, Driving, Rafting and More;

1. Polarized lenses: Polarized lenses substantially reduce glare. Polarization is a great feature if you enjoy water sports or are especially sensitive to glare.
2. Photochromic lenses: Photochromic lenses automatically adjust to changing light intensities and conditions. These lenses actually get darker on bright days, and lighter when conditions get darker.