These glasses are a great value for people who need dependable equipment that won't break the bank. The lenses are glass and subject to the usual scatches. My biggest problem was when the rubber coating on the ear piece started to tear, the lubricant that slid it on the side rail was greasy and took a while to wear off. Once off, the ear loops didn't have the rubber but work just as good without it. I have had my pair for two years now and will buy another pair this season.