I use an afghan prayer rug as my floor mat and a very thin futon-style chair cushion folded over.
I also use a dark-brown/grey blanket as a meditation shawl.
Anyway, I thought you, or someone else, may appreciate knowing about the following inflatable travel cushions at Pariyatti.
I actually got to use one courtesy of one of my American friends at Shwedagon Peyah.http://store.pariyatti.org/Meditation-A ... c_137.html
If and when I go travelling again - I'll probably invest in a couple of inflatable cushions.