I used to love it when we all used to wear these little denim vests over our sundresses. IF you had a particularly boobalicious dress (like this one can be if you make too sudden a move), it gives you a bit of a protective layer. It also makes you feel a bit less full-on naked when you go into a grocery store in the heat of summer and are confronted with the AC and the freezers all going full-tilt.
This little 90s era vest is nice because it hangs at an angle, so the points of the corners of the vest sort of slope inwards towards the waist to create a nice visual shape.
All these items are secondhand. All available in the shop. Except the t-strap wedges. Those are mine, and I'm not sharing.