There's nothing like a fabulous duster or kimono or maxi top (whatever you wanna call them) to layer over your summer look. Whether it's over a bathing suit, a tee and denim shorts, or a cami and leggings -- they can seriously dress up any outfit from head to toe (literally!)
I got this pretty one from Target (similar here) and I've linked a bunch more below (including maternity and plus size, even though all should be pretty flowy and flexible).
Also - special note: these are so great for chestier / busty girls like me because I can just unbutton them and not worry about the size except for whether they fit my arms or shoulders. Total win!