I have a love-hate relationship with Solar Shield Fits Over Sunglasses.  They work well but break very easily.

The Solar Shield Sunglasses provide the full wrap-around and top to bottom sun protection recommended by my eye doctor.  Better than prescription sunglasses.

However, they break when I carry them in a pocket, when I put them in a carry bag, even when I put them on and take them off. They always break at the same place, a thin spot in the temples.

I have worn prescription glasses for 55 years, and only broken one frame, in all sorts of sports and activities.  But I have broken well over a dozen pairs of Solar Shield fits over sunglasses.  I have tried other brands, but they do not fit as well, or work as well, or look as good as the Solar Shield.

If only they were not so fragile.  As I said,  love-hate.