i read about his work, by accident years ago but all seedball adventures i have read about always focused strictly
on red clay and compost with is unsuitable for dry climates.
yes t-shirts (cotton) get very clammy when we sweat. natural wool does not it vents.
woodproducts like newspaper, egg cartons, wood dust and rayon are excellent at absorbing moisture
however silica beads or kitty litter are better yet.
some newespapers are printed with soy ink, others are not and might be detrimental to seed sprouting/development...
lots of experimentation is needed and your help/input is appreciated.
here is another post of mine which updates a lil to what i said here. http://guerrillagardening.org/community/index.php?topic=3197.0
where are you?
Have you seen Fukuoka Masanuba's work in Greece?http://www.youtube.com/watch?v=SefF4zUeMGw
There he used cotton or mulched newspaper in seeballs, along with local soil and red clay.
As I understand cotton is a poor wicker of moisture and that's why it's a bad clothing fiber to get wet in the cold.
Some people have practiced germinating seeds in cotton, because the humidity in the cotton ball can be controlled relatively easily. I have no experience, but we could device an experiment rather easily if you are more interested.
What sort of application did you have in mind?