I leave the side windows OPEN (and screens in) all the time when the cover
is on, at least some air gets pushed through the van.  I use a generic van
cover from Canadian Tire, CDN$100.   Malcolm S

L&A wrote:

> The trouble with van/car covers is that they must breath and unfortunately
> many don't. If the cover traps moisture, then the vanagon is better off
> without anything. I have thought of using a house wrap like Typar. This
> stuff is wind and waterproof  but breaths and allows moisture to pass
> through. This stuff is comparatively cheap. Larry P.S. what could be more
> fitting than a house wrap for a Westfalia.