Thanks again to the idea I got here about using emergency space blankets on the bunk ends of my popup...got them from Cabelas. They are good quality and easily secured with bungees. The reflective material from Lowes was also "cool" to use on the windows. Very much helps against the sun/heat here in Florida, and as was stated, provides privacy too. Used them last summer, effective at keeping debris off the bunks as well. Held up pretty well in stiff breezes. Standard equipment now on my pup along with bunk end fans. Thanks also to the suggestion to change out standard bulbs for LED's, this has also helped cool the interior and reduce electrical consumption.