Long gray button up sleeveless shirt. Wear open as a vest. So many options

Long gray sleeveless shirt with rounded front with slits on sides. Front is shorter than the back. Back hangs beautifully with one back pleat. Front has hidden buttons all the way down. Do up or leave open. Two from pockets. So many options to wear this shirt. Leave open as a jacket/vest. Do up and wear with skinnies and boots. Tie up the front. This lovely blouse is new with tags.