I live in these during the summertime!! (Cali) It gets hot!! They are perfect over a stretchy spaghetti strap tank or a strapless,  just throw one over your head n go!! Super cute with distressed jeans or shorts!! I highly recommend these Flowy tanks. As far as size, they are true to size, but if your in between sizes, go up. You want these to be flowy, not tight. Hope this helps :-)