The Golden Ratio Fits Athletic Guys

Every one of our shirts is built around this golden ratio, regardless f if it's an extra small, up to the double x. It fits athletic guys almost like its custom made. We have people who leave reviews on our sigt that have never been able to find a shirt that fits like this. And so we also get refused ta say like, i look like i'm in great shape, and i'm not. So im this was, this is kind of where wee we started, and in what we've grown on. What are the zimper and the fit?