The line of photochromic golf sunglasses is equipped with 100% UVA and UVB protection photochromic anti-fog lenses which, with increasing and decreasing exposure to UV rays, tend to darken or lighten automatically, always guaranteeing excellent performance visual. Photochromic lenses protect the eyes every day, in the presence of the sun, overcast skies or in intermediate weather conditions. The lenses themselves are anti-fog, treated with a special resin capable of dispersing the condensation that forms on the surfaces of the lenses in the transition from hot to cold. The reaction times of photochromic lenses are very fast: only 8 seconds to go from light to dark, and 35 seconds from dark to light. The frame of the sunglasses in this line is made of non-deformable nylon, a plastic material with high impact resistance. Most Bertoni photochromic sunglasses have interchangeable lenses making it easier to change the lens in case of wear.