I don't know the answer, passing on the question to my followers. :)
Just one idea: Since it is for a baby, it should(?) be made of cotton, so it can be washed in a better way.
There are different cotton yarn qualities, some of the more expensive ones probably last must longer, but I am not an expert. :)
@khzimmer2@knitting Thank you! Cotton was my first thought too but I did worry about longevity, might be worth doing some research there and see if it's a solved problem.
Hmm, this baby stuff is a whole new world to me can you tell? 😆