Glad this post came out! I have a Grady jacket I got many years ago and it is getting quite worn down. None of the one's they have now will work for me. I am not sure how to describe it, but it gets a lot of comments from folks thinking I work for Grady!
I think it would be called fleece and the inside of the sleeves are like a silk type material. Easy to put on over a flannel or other long sleeve shirt without dragging the shirt up to your elbows. It is a loose fit so very comfortable. We all don't look for clothes that are tight to make you look more slim....which I am not a part of that club unfortunately.
Agree with a lot of other feedback above, especially in hats and t-shirts....just regular cotton type.