I used to have one made out of fine jute which I bought from Priceline, but they stopped selling them, and instead sold ones that were made out of very fine plastic netting folded over many times, and it was pathetic because the netting kept on breaking.

I may do something similar with odds and ends of wool

It needs to be something that can cope with being wet and yet is good on the skin, which is why I chose cotton. I'm not sure how wool would deal with it.