The one I use wasn't made by ADCO, but it's similar; I purchased it from either Eurocampers or the Sprinter Store; I can't remember which. I use it all the time for camping. The one I have is plain white canvas, machine washable so I can throw it in the washer when I get home (wash in cold only— it shrinks).
But for storage, a cover that goes on the outside of the windshield is no good; vile miscreants who want to see what goodies are on board can easily pull away the cover to look inside. So I also have a set of quilted Outside Van covers for the inside of the windshield and front windows, silvered on the outside, that I use for storage.
In the heat of summer, especially when I don't have enough shade, I use both covers, canvas outside and quilted inside, to minimize heat transfer through the big greenhouse windshield.
Engineering: Finding complex solutions to simple problems you didn't even know you had.