So I’m thinking of getting it and I tried them on 2 times now but I’m not sure abt the sizings, since tried 0-6, and the only difference for me is how hard they are to zip up around my chest, 0 being the hardest, and 6 easiest. Typically I’d buy smth that isn’t hard to zip up, but this being the define jacket I was wondering if this is normal since the smaller sizes look best around my waist.