I have the same binder as Apollo, and sadly it doesn't do near as good a job for me. I'm a B chest, but they are pretty firm and don't squish very well. I'm pre-T as well. It gets me flat enough to pass, but I don't really wear it. I feel like my chest isn't very secure and is going to fall out the bottom, and their binders don't make your chest "hard" like Underworks binders do. Like, if someone touches it, it still feels mushy like boobs do. Just my two cents, but I'm not very satisfied with my 2nd gen jersey mesh, incase anyone is looking at that one.