You can have any fabric you want (as long as it's cotton).
You can have any color you want (as long as it's black).
That was the funniest part of the email.
At almost half the price of their other gambesons, this seems like a great option. I'm almost tempted to try it, instead of another MRL one, when I get my "proof of concept and where stuff should attach to" finished to copy from.