HI Does a person have to go by the fiber content on a pattern and yarn labels?
I think it depends on how you want the finished product to look. I personally have to use acrylics and plant fiber yarns, due to allergy issues here at home. So I can rarely use the exact yarns called for in most patterns. Find what u like and use that!!!
Depends on what you’re doing. If you’re felting then yes it needs to be animal fiber like wool. I rarely use the yarn suggested.