Insul-Bright - 45" Wide - Sold by the Yard Polyester/Mylar - Machine wash warm, tumble dry low. Needlepunched Insulated Lining, Reflects Heat or Cold Back, Machine Wash and Dry. Made in the U.S.A. Ideal for Pot Holders, Iron Cozy, Table Pads, Casserole Cozy, Oven Mitts, Insulated Soft Lunch Carriers, Baby Warmers, Ironing Board Covers, Water Heater, Cover Tea Cozy, Outdoor Stadium Cushions. Insul-Bright consists of hollow, polyester fibers needlepunched through a nonwoven substrate and through a reflective metalized poly film. The needled material is breathable and won?t break down with washing. The hollow fibers resist conduction while the reflective metalized poly film resists radiant energy. The energy, hot or cold, is reflected back to its source. *At least one layer of cotton batting is recommended with Insul-Bright when used as Oven Mitts or Pot Holders. Insul~Bright is heat-RESISTANT, NOT heat-proof. NOT FOR USE IN THE MICROWAVE!