I love smocks made of natural fibers. They are so comfortable to wear indoors (in the winter with the heater on) or in the summer (summery and light). Here is one I found by Eskandar:

It’s made out of linen and it’s $875 (unfortunately). I could wear this everyday, if I were someplace warm.

Eskandar is a UK brand. Very similar in style to Eileen Fisher. I realize the styles may be targeted to older women who do not have the patience to wear form fitting clothing, but the smocks, and wide pant legs look elegant in the way they don’t constrict the body. Light and airy, easier for movement.