I first experienced AO Bayonets in the US Air Force. That pair latest 30 years. I still have second pair, but now need bifocals, so bought third pair. There are glasses that look similar, except for the AO unique bayonets, but once you try these you will realize that the quality and comfort are levels above the competition.
Pros: Durability, off-the-charts quality, superior comfort of bayonets.
Cons: Not for fashionistas; one century, one style.
This review was written in the old system and had content requirements that are different than reviews written today.