I've had the same pair of Lindberg frames for ~7 years. They were expensive ($800 IIRC), but they've paid themselves off by not needing new ones every few years.
They are a single gauge of titanium wire (don't warp/bend/break) without screws (nothing to come loose). They are so light I can't tell I'm wearing them.
I popped off a nose pad once and lost it so I had to order new ones on eBay, but otherwise I expect them to last for life.
I've had the same pair of Lindberg frames for ~7 years. They were expensive ($800 IIRC), but they've paid themselves off by not needing new ones every few years.
They are a single gauge of titanium wire (don't warp/bend/break) without screws (nothing to come loose). They are so light I can't tell I'm wearing them.
I popped off a nose pad once and lost it so I had to order new ones on eBay, but otherwise I expect them to last for life.