Covering my head with my satin bonnet or scarf then using my winter hat to cover to protect my hair from my coat & the elements (PIGEON POO, rain, sun, smoke, soot, bus seat, cold, etc) seems to help with my hair health...I commute into NYC by bus. So I bought some lovely tams. Right now I have one brown one that is getting abused. These aren't all wool like the one I have now so they can be used in the spring and summer as well.
Here's one that I ordered (I got 4...the dusty purple, a dark green (like army green), a dark grey, and a natural color (looks like taupe)...the person is gonna send me a free gift too since it was my first ebay purchase. Niiiiiice.