Finally, i got this vintage leather biker jacket from ebay. It’s too awesome although it’s a bit too big. Not shrunken like I thought before. I just had to remove the shoulder pads to avoid a rugby-player look. It looks much better.
Anyway, I think drawstring bag is kinda out-of-date but I love the vintage look of it so I’m still wearing it. I just adjusted the strap and made it shorter so it looks like I wore it like a tote bag =]