Nothing black... I got 2 of the cabelas, they're alright if its cool and cloudy, but out in the sun laying on that for 30-40 minutes, insanely hot.
Last year I switched to just a thick type of white/beige canvas from the fabric store, cheap, light, folds up small and takes almost no space to carry, doesn't get hot, washable. I have no need for padding anyhow, this ain't a sleeping competition.