Tan Flannel. Cotton on the inside (Super soft) and of course Flannel on the outside, thick enough if you bump up against it, it will not do any damage, within reason
Had one for my Classic Roadster, I did order it for a 61 Vette (One size bigger), it fit over the whole car, even down to bottom of the tires. They are not cheap; I think I paid around $250 for mine, but well worth the price considering how much my paint job cost. Cheers Tom.
https://www.covercraft.com/us/en/pro...r-cover.C-CCFL