Muslin vs unbleached cotton?

I was on a hunt for some unbleached cotton. Which eventually just led me to asking someone who worked in there if they knew where it was. They just pointed to the muslin section. Nothing really said unbleached cotton. There was unbleached muslin. I found weavers cloth. I know that weavers cloth is used for things like embriodery and needlepunching. I purchased some and I also purchased some muslin. Some osnaburg muslin. Osnaburg has a loose weave in the fabric. I have a few ideas that I am going to use for these. Not what I used to use them for. This should be fun. Something new in mind. Oh I love it.