I was concerned about purchasing these on Amazon for authenticity purposes. These have the 580 etched in the lens. They are comfortable fitting. They kind of round-out around the head and grab behind the ear. They have a bit of metal in the legs so you can bend and adjust to your comfort level to some extent. They are front heavy, due to the glass lenses. The picture shows everything they came with, except for the box and a sticker. I dig 'em.Ps. From the video I saw, these aren't really good to be around saltwater. This is kind of funny because they are named after the town I live in, Sarasota, which is known for its beautiful Gulf of Mexico beaches.UPDATE: After some use, they still feel front heavy. To the point that a 15 min car ride is too long before they literally hurt the bridge of my nose. This has never happened to me before. Also, they don’t fit behind my ears to slide on top of my head. Lastly, they slide down the nose quite a bit with a slippery/oiliness.. The lens are much much much nicer than my others. That is all.