Heavy & substantial weight organic cotton sherpa ( not the light lofty kind) This means warmth. (This is actually a wearable blanket, with big pockets and light sleeves… so you can wear it from the sofa to go get your tea...and to stay cozy all the way!)The thick heavy sherpa is made just for us in the Carolinas. So soft and dense, really keeps you warm! Layers over anything quite easily.