Ramie/cotton vests in a plain knit are my favorite third piece. I have a blackberry(purple) and a navy. I aspire to all kinds of vests. One I rarely wear is a kind of denim-look knit that has possibilities for all kinds of casual outfits.
I keep watching and waiting for a real steal. I'd like a white denim or twill suitable as a summertime third piece.
There are no affiliate links here. I put these in so I could find them again. I'll try to remember to keep checking and take them away when they're no longer available.
Dillard's, review complained about bottom band being wonky.
It's only $14.75.