Organic cotton, grown in Texas and spun in North Carolina.
Except for the novelty yarns, all of the yarns offered are ring spun and formulated for weaving. (There are several ways to spin yarn, and ring spinning is still the best.)
Of course you can knit with them, but they are strong for warp and still soft to the hand.
Some ideas for the Dye-Lishus® cotton can be found in the Inspiration section, especially the Dyeing Cotton and the Weaving pages.