Cristeen is right, GENERALLY people use microfleece for staydry liners. BUT, you can also use regular blizzard/polar fleece too. I didn't know you could use it until recently I was going to buy some premade staydry liners and discovered that GMD sells Malden Mills Polar Fleece liners. It's only one layer, 200 wt.
So, I had some polar fleece already (just from JoAnn's) and decided to try it. It worked great. Bummis makes their liners from Microfleece, but GMD says the Polar Fleece is actually better because it will stand up to more washings and is easier to handle.
Another fabric often used for stay dry liners is Microsuede, or "Suedecloth". I think they're the same (someone correct me if I'm wrong

. I'm not sure if the edges will frey cause I've not used it before.
OH!!! If you do want to use Microfleece, Hancocks has it on sale 50% off right now and you can get FREE shipping w/ this code: HKFEMAILSIGNUP
I just bought some yesterday

hth