First I apologize because I don't know what it's called, so I don't know what to ask for!

I know that misook is a specialty custom type of fabric -
But I reaaaaalllllly like the heavy duty knit as it travels very very well and I do a lot of travel at times - but I very much dislike the price

.....
So - a couple of things -
1. what "type" of fabric am I looking for - is there a specific name?
2. does anyone have a brand they've worked with that they would be comfortable recommending?
3. I guess when I get the type of fabric I'm looking for it will be easier to search for good reference books/sites etc, but if you have places to start, it would be much appreciated!
Many thanks!
Sas