Do such things exist? I've had a couple of shower curtains in the last two or three years (waffle fabric ones, made from polyester) and both have developed mould that the washing machine couldn't shift. Admittedly the bathroom was itself getting mouldy (thanks, shitty extractor fan contractor 8 years ago), but now that's been fixed and I'd like a curtain that won't go black within six months. Do I have to go down the PVC route?