I had never felted anything before, and the instructions available on the internet were just a start, since I was after something different.
I have some gorgeous silk and wool roving from a fellow Etsy seller in Taos.
Partial felting followed, rolled it many times between the bubble wrap with hot soapy water.
Since the roving is a combo of silk and wool, it does not seem to felt as readily as pure wool, although that's just an assumption on my part.
I backed it with brilliant orange silk dupioni to peek out from behind the dark gray burlap.
I wan't after full on nuno felting, with its attendant wrinkling, just wanted to bond the layers together enough to quilt them.
It turned out pretty skinny, there is really a lot of shrinkage! and ended up 11x40".