Cotton-polyester blends
They are not all the same.
Generally speaking, I will avoid using a loosely woven, 100% polyester fabric in a quilt top.
As far as that goes, I will avoid using a loosely woven, 100% cotton fabric in a quilt top.
If the fabric can handle my iron set at cotton using steam - I will use it "like a cotton" -
It seems like a fabric can tolerate a higher iron temperature setting if used with steam than used dry.
But it is always good to test on a scrap first. I know that,because I did not always do that. Crinkled polyester will not uncrinkle!