The most devastating thing that you could go through is finding out you’ve scratched and/or broke your favourite pair of sunglasses. The best thing to do to prevent this awful tragedy is to get yourself a case for your sunglasses. If it were me, I would go full out and get the hard case. Full protection; no breaking or scratches what so ever.
Now, if you’re one of those ladies who don’t carry a purse with lots of space then the best solution is get yourself a Micro-Fibre Pouch. It protects your sunglasses and you can also clean your sunglasses with this pouch as well.
Be sure to ask if the store carries any cases/pouches the next time you pick up a pair of sunglasses.