When you search 'baby blanket' on Amazon, 6 of the 8 top results are made of polyester.
While we're at it, we should also ban all hormone-disrupting chemical additives (PFAS etc.) from being used in products or packaging that have direct contact with humans, human food or water, or can expect to be deposited into the environment (eg. fire extinguishers, ski wax).
We should probably also mandate international standard sizes of clear and dark-green glass for use in food packaging, to make re-use easier (eg. Pepsi should be able to re-use a 500ml standard glass beverage container for Coke or Beer).