Need confortable chairs that pack up in a tube

Not sure what they're called - the ones that collapse and fit in a tube shaped carry bag...

Like this:



We have some old fashioned webbed chairs that fold flat that we can take with our trailer - but they won't fit in our B. We also have some fairly old collapsing chairs - but they sag in the middle when you sit in them. I understand that the newer collapsing ones have more framework under them to keep from sagging - is that true?

So - what's the most comfortable collapsing chair?