Not a Vest but not a Crop Top.....
Bodices, they are all the rage these days, you have to own a few: This Super Sporty Style was designed with an extra bit of "zipper sexiness" to show some cleavage (if you want to!). Front is double lined, so no need to wear a Bra.
Take a closer look at the neckline and straps of this style - it is a little bit more open, cutaway and sexy so your gorgeous chest, shoulders and arms are open.
FABRIC = NYLON COMPRESSION + TAPE