They probably use it in part because it reduces fraying on cut fabric. Given how slippery nylon fibers are compared to natural fibers, I can see this being a hu

They probably use it in part because it reduces fraying on cut fabric. Given how slippery nylon fibers are compared to natural fibers, I can see this being a huge benefit. I sewed a couple of duffel bags out of nylon and got no fraying at all on the raw edges as I was cutting and sewing. That said, I'm guessing mostly it looks good to people who don't know better.