Transitional Photochromatic Non Prescription Clear Lens Classic Aviator Glasses/Sunglasses (U.S. Flag Pouch and Soft Capsule Case Included);

Photochromic lenses are activated by the sun, and they adapt to changing light conditions. If you're someone who likes to go from outdoors to inside and back a lot, you'll want to consider this kind of lens. Classic metal wire frame aviator with transitional lens.