What’s your opinion on eco-rayon?

Rayon is a viscose fiber. Although the raw material is organic, the manufacturing process involves heavy chemical treatment. With eco-viscose fiber, at least the raw material is recycled—85% of the cotton is reused.
In principle, every yarn undergoes some kind of chemical treatment, and eco-rayon is a relatively new type of yarn.
What do you think? Is eco-rayon environmentally friendly?

Unfortunately, I don’t know anything about the technology behind it, so all I can do is Google what others have found out.
But this dilemma exists with many “environmentally friendly” things—even with electric cars, immense damage is caused during battery production, and the same goes for widespread soy cultivation for vegetarian and vegan diets.
There are always two sides to everything, and without a lasting ecological footprint, there probably won’t be much left—so real experts need to carefully calculate where the lesser of two evils lies. And then we’d have to be able to rely on those calculations…
It’s not that simple.

Growing soy for vegan or vegetarian diets isn’t the problem.
The soy needed for that is also grown in Europe.

Just as an aside.

As for eco-rayon, I don’t have any experience with it.

Rayon is synthetically produced.
One downside is that it’s only washable at 40 degrees. Spin it very slowly, and it shrinks.
If you can trust what’s written on the internet.

My personal opinion on this is as follows.

Some people will like it, others won’t. Everyone should choose what they feel is right for them. As with everything, there will be pros and cons.
I’d definitely give it a try.

Best wishes and have a great day 

Thank you very much for your answers. My yarn is only washable at 30 degrees. I like it—the fibers are smooth and have a silky sheen, everything is very soft, and the texture reminds me of wood. The material has properties quite similar to cotton. But 100% viscose is incredibly heavy.

Wow, there are a lot of chemicals in there, or rather, needed for production... Calling that eco is really "very bold" ... to produce a spinning fiber, you need a whole chemistry lab... and from what I’ve read/understood, it makes no difference whether there is recycled cotton in it or not; the manufacturing process is the same/the very same....
I didn’t just look at the "production" but also at the yarn. ... Grandma used to call it "schappe silk"; it made such a lovely crunching sound when knitting 🙈😲😂
After washing, that luckily disappeared....
In my cupboard I still have three skeins lying around made of 40% Ganpi (a paper fiber), 58% rayon and 2% nylon, and somehow I still have no plan what I can make from them 🤷 ....

I’ve noticed quite often that this type of viscose fiber is simply sold online as cotton. The product description only states that it’s recycled cotton—not a word about viscose! You really have to be careful with that.

I guess they know why they don’t specify that. If they aren’t required to… Recycled cotton just sells much better.
It’s just the way it is with so many products: they’re labeled “organic,” “eco,” “recycled,” and so on, but the actual proportion that lives up to that promise is very low....
   "Buzzword marketing"… it just sells really well, and you can charge more for it. “If something’s good, you’re willing to spend a little extra on it”… 

Advertising with ecological claims without actually living up to them is also known as “greenwashing.”

...that’s true, and some companies are “really good at it”....
But only if we, as consumers, read the labels very carefully—and even read between the lines—can we figure it out.... Trust is good, but verification is better.