this is my 4th pair of Persol's in 8 years. first pair left in a rest room and the other 2 pairs broke after using them for 4 years each. i have 4 boys and they always end up breaking them. i've left them on top of my car and drove away and drove back to find them on the floor is great condition.  done that so many times. the lens seem very strong very scratch resistant. and the plastic frame is very durable like ive said after about 4 years the frames to become more brittle but yeah to me thats a good return on my investment i have 4 boys 2, 5, 7, 9 and they are always tackling me and wrestling me and these glasses have ben knocked off my head so many times i've lost count.

it's a great product and being bought out hasn't lowered the quality. would definitely buy again