The sites images also point you in the right direction, if you're looking to accurately recreate a vintage look
Viscose - a material derived from plant fibers, but it is a fabric classified as an artificial product
In putting together this post, for example, I easily looked at fifty vintage fall and winter weight robes and housecoats (the major difference between the two, by the way, being that robes usually stay down up with a sash/tie around the waist and housecoats are zipped or buttoned up the front - though another school of thought says that robes are for wearing when you get out of the bath/shower or immediately in the morning, whereas housecoats are to be kept on throughout the day atop other clothing) and nary a one was above $150.00 - many, in fact, came in well $75.00, making them comparable to the price one would may for a new version in many shops these days
Albright Shift Dress Albright Shift Dress Albright Shift Dress Straight fit shift dress with a tank neckline, side panels, and welt pockets with novelty buttons
It's also made from a soft and breezy fabric that'll let you move freely on the dance floor
I feel as though Ive been preparing for this moment my entire career in fashion