[jhanschoo]

There's really a lack of rigor in this post. 1. The author needed to clarify why polyester microplastics are harmful in a way that cellulose microscopic fragments aren't. 2. Natural fibers could just as well be treated in a manner that gives you all the issues described.

Really, the salient issue here are the treatments and dyes involved in the production of cheap modern fabrics, and polyester itself, and OEKO-TEX is concerned with those.

Of course, polyester microplastics are environmentally harmful, but that's a different argument altogether.