I have ordered 3 of these tops in the past year. The label indicates they are a cotton/linen blend. I thought I would have to order up because of the content, but, after the first purchase, I ordered down to my regular size (8 or medium). The top is designed to fit loose, washes well (I even used the dryer on the larger size but did not notice shrinkage), and needs no ironing since it is designed to have a puckered appearance. I like the longer sleeves as opposed to cap sleeves which give betterSee full review