The thermal Batting product that’s been around the longest is Insul-Bright from The Warm Company. It’s made with hollow, polyester fibers that have been Needle-punched through a non-woven substrate, and then through a reflective metalized poly film. The needled material is breathable. The hollow fibers insulate by resisting conduction. And the metalized poly film resists radiant energy by reflecting it back to its source.
It contains no resins or glues and will not shift, migrate, or bend. Thermal fabrics are useful for all kinds of projects where you want to keep hot stuff hot and cold stuff cold, such as pot holders and oven mitts, table pads, lunch carriers, shopping totes, ironing board pads, tea cozies, and many other items.  You could use it in clothing, but it would be rather noisy. However, babies and animals often love the noise and like to scrunch it up in soft books and toys.
Insul-Bright is machine washable, easy to cut to size, and  is quite nice to work with.
45 inches wide