I carry a white baby cloth w/ me (like a burp cloth) and cover my bag in the car so that it is not exposed to sun when it isnt necessary. Your bag WILL get sun exposure from walking outside, but unfortunately, there is nothing we can do about this. I just checked w/ my neighbor after reading your post as she is an avid collector of expensive designer purses....she owns 4 Coach black signature purses, and this has not happened to her AS OF YET she said! BUT, she also carries the white baby cloth and covers her bags in the car as well.....who do you think I got THAT advice from??? LOL