I use the common jumbo size reflective mylar springy sheets found in
Wal-Mart on sale in the winter. Around the edge inside they have steel so I
stick them up with strong magnets anywhere for instant shade. Even stick
them on outside the van if the wind is not too strong.

The trick is to have about 8 of them on hand and make a sling for them
using webbing or bungees up on the ceiling. Folding them up is a bad idea,
leave them stretched flat for maximum life and performance. Have clear
packing tape on hand and repair them immediately on the non-reflective side
in case of damage. They last about 4 years that way and you get great value.

They also double as picnic table covers, rain-sleet head covers and brain
shields for when the agency is scanning your thoughts. Just saying...

-- Gnarlie.

On Wed, Jun 11, 2014 at 8:53 PM, Don Hanson <dhanson928@gmail.com> wrote:

>    I use a cheap fold up foil-faced cardboard thing....Works for light and
> privacy and some heat retention and blockage from sun heat...Folds up and
> slips behind my trash can...when it wears out I get another.   I 'fit' it a
> little (with scissors) so that it tucks behind the inside mirror and the
> sun visors...it actually works pretty good...If it is going to be hot, I
> have to park in the shade, my van being dark brown...or go outside during
> the day and hang in the shade.
>