I'd suggest looking at the Paramo dark cloth designed by Joe Cornish and David Ward (both well known and respected photographers in the UK) which is sold at the Linhof Studio store.

https://www.linhofstudio.com/product...amo_Dark_Cloth

It's light-weight, black, made from waterproof Analogy fabric, has an elasticated collar at one end and a zipper down the length so you can adjust how much room you have under the cloth.

I wouldn't be without mine.

Mike