I was very hairy before HRT and surgery, with full chest hair. Now, years later, the vast majority of that hair is gone. On my chest it mostly either vanished completely or turned into little, thin, blonde hairs. The same thing happened on my stomach (I never had back hair) though my lower abdomen responded the least. I was able to run a razor over everything once a month or so to stay visibly clear, but now I am having electrolysis to clear up any remaining excessive hair on my torso. Everybody is different, but most of us will have a pretty good reduction in body hair thanks to HRT.