UPDATE: It pains me to write this, as I just love the old version of these. Unfortunately, the new ones are blurry on the edges. Really blurry and unusable. I love my old ones (and gave them 4 stars), but I had to return the new ones (and dropped my rating to 1 star). Hopefully they will fix this problem with the lenses.ORIGINAL REVIEW: These are great. I bought two similar pairs at Walmart years ago, but those are no longer available. I like these almost as much (although they are not quite as low a profile, which is why I rate them 4- instead of 5-stars).I adjusted the nose pieces a touch, and they fit perfectly. They have a spring hinge, and so will bend out slightly beyond 90-degrees. This also seems to cinch them to your head slightly. I wore them wiring in my attic the last three days, and shifting into every position imaginable--sideways, face down, you name it--they stayed put. They were completely comfortable. They gave sharp focus.If I did not already own the Walmart pairs, I would have rated these Calabrias 5-stars. That's not entirely fair, I know. To make up for it, I should note that I found the bill of lading from China for the Walmart pairs, and I learned that an Italian company also sold that version for $350, "made it Italy." Ha! So these Calabrias are almost as good as fake Italian glasses. "molto buona!"