I may have listed my blue scrubs on this list before, but they require mentioning again. They are as comfortable as sweats, wash up even better and can be layered to be warm or worn as is for cool. Just the right mix between heavy and light weight, a variety of colors, prints and styles.
Although we all wear them at daycare, you won't ever see us wearing the same piece as anyone else. Then, they work out great for me because I can work at my desk job in the morning, but head on over to the spa to finish out my day without changing. And go to the grocery after, feeling totally comfortable.
I sure hope that none of my places decide to switch to company logo shirts, unless they put our logos on a scrub top. Even tees aren't as comfortable.