So I found a really old black v neck tshirt with 3/4 arms..Well still above my elbow and long in the body.
It was cotton but with some lycra so it fitted well but not sweaty. It's was from Dorothy perkins and it's the most flattering top I've ever worn. The black has now faded but I also had a white one. Its was perfect
Has anyone seen anything similar? I'd love to get another for summer.