kateluo 2020 polarized sunglasses men glasses for driving day night vision goggles pchromic pilot sun glasses for men 7759 1006, White;black

pchromic polarized lens pchromic lens with intelligent psensitivity factor. transparent and clear lens, pchromic uniform. change with the uv intensity under the sun. driving in tunnel normally, no need to take off. the pchromic lens react to uv light and not to visible light, there are circumstances under which the darkening will not occur. frist example, is in your car. because the windshield blocks out most uv light, pchromic lenses will not darken. second,is indoo