Seacell- a cellulose fiber created from seaweed, supposed to have properties that allow it to exchange minerals with the skin, vitamin e-etc.
Mentioned a variety of other fibers: Hemp, bamboo silk (Antibacterial properties) Merino, alpaca, etc.
I knew about these, seacell was new (and it turns out expensive)
*This is a very good, if very brief, list of blending fibers. What few fibers it does cover it covers thoroughly.*