I don't know if they are really HD but they are excellent glasses. Having recently had cataract surgery I have to be especially careful in wearing sunglasses outside all the time. I am pleased with the great results in the sun & on cloudy days when wearing these inexpensive glasses. I recommend them fully!
I am sorry to add that after two months of varied use the frame split over the lens and then the plastic lens split. Save your money and buy a better brand. Yes, they are cheap and cheaply made!