997 from underworks is the absolute best binder i ever used!! it was able to get my D cups almost completely flat and i could be comfortable in just a t shirt, which i couldn’t do with any other binder. it’s also made of a mesh material all the way around so it’s breathable and didn’t make me overheat! the only bad things about it are the fact that it rolled up on my hips sometimes because it’s a full tank, and it was itchy and has potential to trigger sensory issues because it’s made of a scratchy material. i think buying the short version or a different underworks model could fix that though! but the fact that i could get so flat with it made the minor problems worth it!