I've been wanting to do this one for a few months now. Grassroots has a "we don't want to spend all day counting inventory" sale on right now so I picked up a hemp shower curtain to replace our old fabric one. It's not as bad as an off-gassing PVC one, but it's getting a bit manky (even with laundering) after several years of use nonetheless. And who knows if chemical fungicides had been added to it to make it mildew resistant... It is likely that it's been coated with persistent contaminants to make it water-repellent. Yikes.
Why hemp? Because it's naturally anti-fungal and antibacterial. Because hemp plants use much less water than cotton. Because hemp is grown without chemical fertilizers and pesticides. Because hemp controls erosion of topsoil. Because apparently hemp replenishes the soil with nutrients and nitrogen. Because hemp grows in Canada. (Actually, all of these reasons make me want to buy everything from hemp!) And because it doesn't require a vinyl liner.
It wasn't cheap, but it should last a lot longer than the manky old chemical filled PVC/nylon/other ones that are too hard to clean to keep around for any length of time.
~ Lynn