
The problem is that these glasses are a piece of crap and the company does not care. Every one of the 4 pair I have bought, broke on the stem, "same place" and either right or left sides (2 each). I have cannibalized the pairs that I had purchased to finish out my inventory I have. Clearly there is a problem.
I have contacted the company to advise them of the issue and they will gladly look at them if I sent them in and include another $6 for shipping. "What?" What that told me is that we do not care if you already spent $20 a pair on these, and "maybe" we "may" replace them if we determine we should. There are a lot of ifs there and no guarantees. I can see 1 breaking, 2 in the same spot - possible, 3 pretty co-incidental (as the Duke would put it), 4 - there is something wrong in mudville.
So, if you are looking at these at the store, run, run fast. Do not waste your money. I handled my last 3 with extra kitten gloves and only made it about 6 weeks with any of them.
Bottom line don't do it, find a quality pair with a company who will back their product up.