Classic style with the novelty of a folding feature, sometimes may be handy, and different from many other sunglasses, however I think they are a bit over priced for what you get, although I didn't pay full retail price, ( which I believe is $150 US ) I think for the same amount you get a much better pair of sunglasses, however, I still can't comment on the durability of this system since I alternate sunglasses, I would assume they are not bound to last as long as the non-foldable models since it obviously has more moving parts, but if you want to go with foldable sunglasses, then these are a good option