if you don't want to get the custom fitted PUGs, then buy a couple of the generic 5x7 thermal/solar/all-weather/sportsmen blankets and put them on.
you may want to buy 3, since the front bunk is longer and one 5x7 won't cover it completely.
average cost is around $13-$14 each and are available at REI, Cablelas, Campmor and various internet sites.
they do more that just reflect heat. they help darken the tent end, they help keep the canvas clean, they help retain heat when it's cold and they help cut down condensation.
they are the #1 Hybrid mod.
and Zoe the Wonder Dog(R.I.P.)
'07 Roo 23SS pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC