It's pretty bad. Air: the originals, still rather good, just reinforce the fragile temples Air 2: the current standard, pile of minor upgrades and higher dura

It's pretty bad. Air: the originals, still rather good, just reinforce the fragile temples Air 2: the current standard, pile of minor upgrades and higher durability Air 2 Pro: same as the Air 2 with an electronic dimming option for the lenses Air 2 Ultra: the Air platform dev kit The very bottom of the Air 2 page has an Air/2/Pro comparison.