Just got these last month and thought I'd share my thoughts.

Quite simply, these are the BEST riding glasses I've ever owned. I don't say this lightly. I've been riding 10+ years and have had just about every brand, including Vuarnet, other Oakleys, Ray Ban, etc. You name it, I've tried it in search of the "perfect" riding specs.

Fit: I have an average face, and these are a dream. They don't squeeze my temples at all, and the arms are flexible enough to ensure a tight fit without hurting. The biggest benefit is the lower and upper frame fits against my cheek and brow, keeping wind and road debris out. It is also large enough to keep sunlight out of the top and sides, and peripheral vision is not compromised at all.

Optics: Nothing beats polarized lenses. A quick review: Light comes in waves (see: quantum mechanics) and this causes natural distortion as the light bends across the eye's own lens and hits the retina. Polarized lenses dramatically decrease this distortion (too detailed to explain here). That means you see that pebble from 100 feet instead of 15, that small hole from 200 feet instead of 40. It is AMAZING how clearly you see things. I ride one route very regularly, so I know every nook and cranny of it. At least I thought I did. The first ride on that same course with the Jawbones exposed some hidden dangers I had never seen with my Oakley Scalpels, Laser, or Flak Jackets (or any other glasses for that matter). It is amazing what TRUE polarization provides. Now, you often see the word "polarized" advertised on glasses costing less than $100, and that is a bunch of b.s. You can't do it right for such a low cost. Why do you think Ray Bans all cost $125 and up? Because they do polarization right. And so does Oakley.

Cyclocomputer: One of the ways you can tell glasses have lesser optics is when you look at your cyclocomputer, there are dark and bright areas (I have a Garmin Edge 305). With Jawbones, every # and letter is crystal clear and easy to read. I don't have to lift my glasses anymore to read the display. That's important for safety.

Light Filtering: In even the brightest sunlight, these work like a charm. No pair has provided the light obscuring effects these do. The amazing part? I was out on a ride, and what was a sunny day turned dark and rain soaked. Somehow, and I don't know how, these glasses did not make it seem darker. They almost know how to let more light in when it's cloudy. I was able to see just as clearly going out as coming back. And the water just beaded up on the glasses, unlike other glasses where it blotches everywhere. This is due to the hydrophobic coating. Further, because they are close to your face, rain didn't seep in through the top part of the frame.

Iridium: I don't know what the purpose is of this compound, but whatever it does, it works. Perhaps it is to reduce glare? If so, it works.

Vents: They have designed ingenious vents in both lenses, in the outer upper portions. But they're not normal vents. Normal vents let air enter in a laminar pattern, which directs it straight into the eye and dries it out. By using small dividers in their vents, they produce turbulent flow, which creates a vortex of air in FRONT of the eye very close to the rear of the lens, so your eye never feels the breeze. This is exactly where it is needed to keep the lens from fogging up from perspiration or when it rains.

UV protection: Guaranteed 100% against UVA (low energy, but penetrates pretty deep), UVB (does most eye damage), and UVC (a new player, generally considered the most powerful of the UV spectrum). I have no machine for testing this claim, but I'm sure Oakley does, and if they say it, I'm inclined to believe it.

Frame: It is hinged, and unfortunately, it is a tad difficult to open it to swap out the darker for the yellow lenses. However, I have another pair of lighter colored glasses (Bolle) with yellow lenses, so I wear these when needed. Thus, I don't plan on ever switching the lenses on the Jawbone. While I'm sure they work well, I have never used them so I can't comment here.

Protection: I got hit square in the middle of the lens with a rock during a paceline, and it just bounced off. No scratch, dings, or damage. And this was a BIG pebble. Other glasses might have broken or scratched, but not these. I was amazed quite frankly. These glasses meet the American National Standards Institute (ANSI) specs for impact protection. ANSI specifies protection levels for motorcycle helmet shields, for example. `Nuff said.

Summary: If you want the ultimate in fit, geometry, sun filtering, road debris protection, polarization for maximum clarity, and on and on, then these are the glasses for you. If you can't get yourself to spend the money to provide your eyes with all the advanced benefits of the Jawbone, then I suggest you buy the $15 pair from CVS and call it a day. However, they'll fall short of these spectacular biking sunglasses

For me, it's the Jawbone. Nothing else even remotely compares.

FIVE MONTH FOLLOW UP:
I've put a good many miles on the bike with these glasses. They continue to amaze. They seem to resist smudging and water drops, which don't splatter, they just stay as drops so you can see through them in the rain. One minor issue is that they are polarized which it makes it somewhat difficult to see my computer when riding. I have to make sure my head is tilted at the proper angle to be able to read it, otherwise the light entering the glasses is at an improper angle and gets filtered out, thus unreadable. But that means they're also filtering out ALL the bad wavelengths, which is what makes them so crisp and sharp. I gave my Oakley Lasers to my son, which he loves, so we're both happy.

Enjoy the ride!!