Global vision lenses are crafted from shatterproof polycarbonate, and decentered to provide maximum clarity and peripheral vision. All lenses offer UV400 protection and a scratch resistant coating. They Filter out both UVA and UVB rays with wavelengths up to 400 nanometers, offering protection from 99 to 100 percent of harmful light. Our 24-hour transitional photochromic lens can be worn at all hours of the day, evening, outdoors and indoors because it self-adjusts to the ultraviolet light. It is also our continued goal to provide our customers with cutting-edge technology that goes above and beyond UV protection. These innovations in both lens and frame construction ensure that the user has a multitude of options in selecting the right eyewear. Global Vision Eyewear products are covered by a one-year replacement warranty against manufacturer defects under normal use. Scratches are considered normal wear by industry standards and are not covered under this warranty.