I love the idea of the naturalmat rollmats, but for two adults and two children we are looking at £500 for the naturalmats! Cotton mattresses are cheaper, but still £250 for one double and two single mattresses. I guess we could get two doubles and the kids can share but still wouldn't mind looking elsewhere to see if any other good quality recommendations.
I like the idea of these as they are easily rolled up and out of the way in the day/easily transported in the car, and unlike airmattresses, they dont get punctures when the kids bounce on them!