I have bought and returned other makes of glasses that advertised polarized night driving glasses but in fact were NOT polarized. NIGHT DRIVERS from SHERUM are not polarized despite their advertising. When I asked to return them, they said that the cost of return shipping to China would be more expensive than the glasses. I had to negotiate a 50% credit to my card. Not satisfactory at all. Not only are the Sunglasses Guy glasses polarized, resulting in a significant reduction in glare, but his warranty is excellent. They are even warranted for 50% if you damage them accidentally. Great product and service.