I like cast iron. You have to season it. You have to clean it carefully. But in the end it is less work and your food tastes better. People used to use it all the time but it got replaced over the years by marerials that require less investment, like Teflon and stainless steel.
Wool underwear sounds about as comfortable as a wicker corset and as about au courant. But when I read that it is as water proof as rubber pants and has the added benefit of breathing it started sounding much more attractive. Especially since yeast thrives in damp environments. While disposables stay dry, I don't like the chemical dessicants touching her private parts. So I bought a wool cover (from Green Mountain diapers ). It was as fussy as seasoning new cast iron. I had to wash it by hand and lanolize (imagine conditioning your hair ) it a couple of times before it stopped leaking like a sieve. But it is by far the softest, kindest diapering object I could put on Lulu's heiny (short of training her to go diaperless).
I am finding that my grandmother was right, wool is dandy (we have a wool soaker of my father's that my grand mother knit him when he was a baby ).