I was looking for inexpensive insulation to insulate a stove. I didn't want to use fiberglass insulation as the fiberglass could end up in the beer. I didn't want to use bubble wrap because of the 150 degree temperature in the cooker. Rated for 160 degrees, this insulation is made from cotton with an aluminum backing so there are no melting issues. I laid the insulation back to back (cotton side to cotton side) and used aluminum tape to tape the front and back together. Worked great. Keeps my stove at a constant temperature and the smooth aluminum backing allows me to easily insulate the stove.