I bought this outfit last year hoping to wear it in the winter. However, I had lost a lot of weight and could no longer fit into it when I tried it on! I own several outfits from tkees (4 in total) and they are my favorite!! The core is 80% cotton only because of the fleece. Their clothing is so comfortable! You’ll want to wear it every day. The sizing on the pants says for size 3 it ranges between 39.5-42. Size 12 is the highest it would let me pick.