Originally Posted by Walkabout
Nice idea: I've seen those mats in the camp shops and I can see what you are saying!
It should be robust and surely it achieves the same effect.
I have wondered about stuffing some bubble wrap into a bag in much the way you describe - I guess anything that takes away the pressure points is going to be better than most stock saddles.
It works well and is very cheap compaired to an airhawk. I found the best results where if you only blow it up enough so you could see it take shape. This just raisers you off the seat enough but you still get all the feeling you need to ride the bike.
The main problem i had was finding a good place to strap the bag to under the seat. But i might get it modified and see if velcro would be able to take the strain.
The bubble wrap sounds like a very good idea. Might pop too much with my weight on it.