Looking at the fabric content of the cloth liners, it looks like they are nylon or polyester----not exactly as natural as I had imagined/hoped
.....so that factor might have a lot to do with it still keeping the water inside the shower, huh?
I had tried making what I think was a 100% cotton shower curtain. It just wasn't heavy/tight enough weave to keep the water in the shower. It seemed like once it got wet it allowed the spray out. (This was tried in a stall-type shower, not a tub shower.) I ended up going back to the vinyl kind...but am again pondering the cloth kind...