Me To We (www.metowestyle.com). They offer domestically made,
sweatshop free fabrics that are great quality. They offer organic cotton,
bamboo, recycled polyester, etc. They are also a social enterprise- half
their profits go to Free The Children.
They are definitely more expensive (especially if your design requires a
multiple colour silkscreen) but a good option if your fans will be willing
to pay more for quality and socially-responsibility.