I recently attempted to make a flak vest versus buying one. It came out exceptionally well, but i have a question about the material itself. I made it out of tackle twill, however one side is really shiny, and the other side is not so shiny. Which side should i face outwards? I did some preliminary research and thought the shiny side should face out, but the more pictures i see, it seems to be the opposite. What's the general consensus?