I use insulbrite and warm and natural for my potholders. I make them just like a quilt, but only 9" square. I've given them as gifts, they seem to love them. I have made some for myself and wouldn't use anything else.
I'd say don' take something hot out of the oven and walk to blocks with it, I imagine it will get pretty hot!!
HAPPY NEW YEAR TO ALL!!
simple quilter