Bamboo!

I found this swatch of woven bamboo fibers! It's so cool, but this is a very rough swatch... so it would probably not be very comfortable. But you can buy finer woven bamboos that are really comfortable, they feel like cotton.

Independent Designer Rachel

Rachel is an independent designer and former Parsons the New School for Design student who designs with more sustainable practices in mind. The majority of Rachel's fabrics and trims are either organic or vintage. Rachel works on her pieces in her apartment/studio in the Lower East Side. Rachel graduated from school last spring and has been working on her collection since then.
Rachel uses organic dye methods to achieve unique colors and patternsMany garments are finished with handmade embroideries and painted details. Rachel's mother is an artist and collaborates with her on many projects.

Rachel buys her natural dye materials at The Yarn Tree off Bedford Ave in Williamsburg, Bk
http://theyarntree.com/

In the city Rachels buys some of her organic fabrics at Mood on 37th St. Between 7th and 8th Ave or at C & J Textiles at 230 38th St. 7th floor, but for more variety and selection she buys online at http://www.nearseanaturals.com/