Organic cotton labels.
BCI Labels just sent us a sample pack of their clothing labels -- you know, the tags in clothes with the maker, size, care instructions, etc. Among the wide assortment of styles, sizes, and types that they produce are some printed on organic cotton (scroll down a bit; you'll find them). They appear to be quite nicely made, and the short correspondence I had with the company went well; they seem responsive and fairly quick to answer emails. There's a minimum order of 1,000 labels, and the silkscreened organic labels range in price depending on how many colors you need. There's a $50 setup charge, and there may be other fees too -- I didn't buy any labels, I just wanted to pass the information on to our customers because it's a resource I've been asked for many times in the past. I would personally double-check that they are still using organic cotton when ordering, just because I tend to be skeptical that way, but BCI definitely seems like an option worth exploring.