Sorry, I've been wearing Amtrak for half a month, but I don't think there's any change, maybe it's because it's not obvious every day. I go home once every half a month. I asked my mother what I had changed, and she said my waist was thinner. You have to stroke yourself every time. If you don't stroke yourself, the effect will not be very good. I also bought it when I saw the owner wearing it and the effect was good.