I use to buy broadcloth years ago to make shorts. It was never thin, I found it to be heavier than 100% cotton. I do think it had polyester in it, all of it's good qualities is why I used it for shorts. The old 100% cotton was almost impossible to iron the wrinkles out of.
I don't buy name brand fabrics as they don't seem to be better quality than the cheaper fabrics I buy. I always buy by feel.