Chic black nylon messenger style?

  1. I've been on the fence for awhile about them, mostly b.c they tend to look very "high school", which is fine if you're in high school. But I am definitely not.

    I'm in the market for a simple, classy, chic, giant messenger style that will never go out of style and will hold up under all conditions. I'd prefer one w.o the little flap thing over the top, but am flexible on that.

    Can anyone help w. suggestion?