This binder is awesome, it is the only one I have ever found that works for me. I am a transsexual man, and I am quite thin but require a binder with strong flattening ability. This one works very well and it is also comfortable, no bruised ribs, doesn't put pressure too
This binder is made of a stretchy, very soft material, and I didn't expect it to be so effective, but it makes getting dressed far less depressing, and makes my chest completely flat (almost normal-looking!! I was stoked!).
I also use the tri-top binder sometimes, but it is not comfortable (that harsh, scratchy fabric, ugh) and has now been designated as the back-up binder if I don't have this one. This one has a low neckline too---the tri-top always seemed to be -just- slightly too out of proportion to be entirely invisible (not good for us who are stealth). I would have rated it all-star except that it only comes in a long version. Please make a short one!