In reply to Jackspratt:
The biggest, fattest and most durable you can afford, fit in the car or flat.
I like the Organic Big Pad a lot, but it is really big and spendy. The Snap Grand Wham (old model was Grand Wrap), might even be better, but it is also bulkier and heavier (own smaller Snap P’tit Wraps, and really like ’em).
That said, even a small pad is better than none, so BergFreunde edition Ocuns or EpicTv Psychi will do just fine.