THE SUNGLASSES LOOK AND FEEL GOOD AND KEEP SUNLIGHT FROM COMING IN THE SIDES OF THE GLASSES. ONE NEGATIVE IS THERE IS NO MARKING ON THE SHADING OF THE GLASSES, EVEN THOUGH THE LITERATURE HAS DESIGNATIONS. MINE CAME WITH A LIGHT BROWN AND A MEDIUM GREEN SHADE. I WOULD LIKE A DARKER TINT, BUT OTHER THAN BEING COSTLY, I DON'T KNOW WHAT DESIGNATION TO ASK FOR.