Solarize is a unique insulating fabric that creates a thermal barrier keeping things hot or cold. It works with the shiny side in or out - you choose. Heat it up by solarizing inside pillows, fabric scarves, mittens, jackets, hats and blankets for added extra warmth. Keep it cool by solarizing inside can cozies, thermal freezer bags or ice pack wraps.Color: SilverContents: 50% polyester, 50% aluminumWidth: 22" (55.88 cm)Maximum cut length: 10 yd. (9.14 m)Do not microwave