Borrowing an account from a UKG member (with permission of course!!) to ask a quick question as I am working on a set of SG robes for said member

I have been doing a load of research and found fabric I am happy with, but suddenly, whilst examining someones RG robes at the weekend I began to wonder, what lining material do SG robes use? Is it velvet lined with velvet (like the RG robes I looked at the weekend) or is it standard "lining" material, which can have a touch of shine to it.
I want to be absolutely as accurate as possible!
I have looked at numerous screen shots from EpI where you can see the undersuit for the SG's and also have the "Dressing a galaxy" book, but the shots are just not close enough for me to make a decision on the lining

Thanks for the help guys

Fran x