Every pair of cycling sunglasses I've ever had seem to scratch really easily. Generally my lenses end up scratched after being worn just a few times, and sometimes after a single use.
How come basic sunglasses scratch so easily, and is it possible to buy sunglasses that have some sort of anti-scratch coating on that don't cost a fortune?
How come basic sunglasses scratch so easily, and is it possible to buy sunglasses that have some sort of anti-scratch coating on that don't cost a fortune?