@a3fff623 I go through this very same thought process regularly. Shunning polyester makes the hunt for fabric more complicated especially for knits. I wish there was a good source for quality bamboo or wool knits in the states. 

 @f2f81009 I get my bamboo fleece from https://www.kinderel.com/ in Canada. The prices are good and the shipping was much faster than I expected from Canada.