In reply to Brendan:
I've just about worn out a Snap Wrap, but it has taken a lot of hammer over a number of years, and has been all over Europe. I'll replace like for like with a new one. It's good and firm for highballs, and my back really appreciates the fact that it's compliant for sit/lie down starts or low roofs.
The grand wrap is a monster, so make sure you can physically get it in the car. The rest of their pad range is also excellent. Very well made, good large size, and about the best out there.
The only pad to come close is the Moon Saturn, which again is well made. I just find it jars all my old bones on low overhanging problems, but if you've other compliant pads on top of it it's excellent.