Anytime you blend fibers there is a give and take. When you blend linen with polyester you get a fabric that is less prone to wrinkle but more prone to stains setting in and less breathable. With other blends you can run into things like itchy fabric, difficulty with cleaning, different structure or drape and less breathability. A lot of women like a blend for the “less wrinkles” feature but I personally don’t mind the wrinkles and do prefer 100% linen or a blend of linen and another natural fiber like silk.