Vass latte color is darker than that pictured (more of a tan than a light beige).  Kind of cheap material with shine, but it is very stretchy and pretty soft.  There is a slit up one side.  You could get it as a nightgown or to wear under clothes.  If you need a fitted slip, I could very easily see you ordering a size down; it is stretchy enough that it won't tear or suffocate you.

I am 6'0" 170 lbs and ordered a size L.  Even being tall it covered my bum.