You can use whatever batting you like. I would tend to use something like Mountain Mist Blue Ribbon 100% cotton to keep with tradition but this bat requires pretty close quilting (no less than 2" apart).
However, I think wool batting would be very nice as well.
You can also use an 80-20 blend like Hobbs Heirloom.
Any batting will be fine it is just what you like to work with when hand quilting and what you want the finished look to be like. A 100% cotton will give you that nice antique puckering after washing due to shrinkage.