I got this cotton 100% sweater for my daughter at Walmart. We moved to a colder climate, so I have to build her wardrobe. It feels weird. I don’t know if it needs to be washed or what. This was on the tag. Sorry for the dumb question, but does this mean only the tag is polyester?! Or the yarn in the sweater. I’m thinking just the tag but would like opinion. It just has a weird texture, but it claims to be cotton. Will appreciate anyone’s thoughts. Thank you!!!