It's no secret that I like German gear. My sunglasses from
Breitfeld & Schliekert are about ten years old but the makers still sell the design and have all the spare parts, including the tiny parts.
I wear the orange lenses all the time, day and night, unless it is really bright, in which case I swap to grey or brown or very infrequently polarizing; if I'm going a long way at night, I wear the yellow lenses.
In the ten years I've broken a small plastic clip piece on the orange overlenses, which was replaced with no trouble by my village optician, and I ordered a spare orange clip (both lenses are attached to the small black clip that in turn attaches to the frame) in case my beloved everyday set should be scratched, but so far the lenses seem immune. I don't know what hardening process they undergo but it is very effective.
I also have a spare frame but the original is firm at all joints and clipping points, and the plastic does not seem to have deteriorated in ten years, so the spare is unused.
Two pairs of frames with Rx clips, special clear glass prescription lenses, and all the different colors of overlenses, including polarizing, came to about 115 Euro (from memory -- seems low, but that's what I remember). Compared to what I normally pay for reading, computer, TV and walking spectacles, that seems extraordinarily cheap.
Some of the overlenses I have (it may be that I received some of a special promotion, but I seem to remember that two of the lenses came "free" with the frame and the very nice hard zipper storage bag, still looking new after ten years of use).
Breitfeld & Schliekert 8918 Rx system lenses: clear nightime windbreaks, orange (good for dusk and dawn cycling), yellow shooter's (good at night); I also have grey, brown and polarized (rarely necessary in Ireland).
B&S model 8918 Rx System parts:
https://shop.b-s.de/de/search/?q=8918&models=wshop.artikel&models=cms.pagede&x=0&y=0These are the double-lens type I have. Normally the prescription lens is also plastic, but I have glass in my Rx clip, and the extra weight has caused no problems whatsoever. When I recently had other spectacles renewed or replaced, I also gave the optician the B&S sunglasses "to be serviced as new" and he gave them a quick look and tested the rubber lock on the Rx clip holding the prescription glass in, and gave them back to me immediately.
They have non-Rx models for people who don't need corrective prescriptions.
B&S has the further advantage that nowhere on them does it say "Rayban" or "Oakley". There's no logo on mine anywhere, and I've never seen a B&S advertisement, so I'm not paying for a whole lot of extravagant marketing, but for engineering that has proven itself on my face and on my bike.