>>2124792It also reduces pilling and fading/bleeding of the dye.
I once saw a really neat jacket made of wool; it had brown wool for horizontal threads, green wool for vertical threads, and nylon rip-stop squares sewn in to keep any holes from tearing into bigger holes. It was really neat, it seemed to change from green to brown depending on the lighting and whatever was in the background, and blended in really well with the terrain. I wish I knew who made it.
