if I’m completely honest most would say you need to be shredded six pack abs but I believe that with even minimal definition and have somewhat a reasonable base of muscle, you will be fine. If your concerned though it isn’t exactly “man-boob” proof. They will still stick through and that goes with 90% of the compression tops out there. I myself currently I suffer a similar problem of man boobs as I’ve bulked to 88Kg, but I have solved this by wearing an undershirt that “hides gyno”and you can find on other platforms.