Crystal clear plastic sheet that shrinks tight and wrinkle free with an ordinary hand-held hair dryer. Easily installed on metal, painted or varnished, wood or vinyl clad frames with double-faced tape. Increases R-value of single pane doors up to 90%. Includes 1 plastic sheet 84" x 110" and double faced tape 1/2" x 42". Insulates 1 patio door up to 7' x 9' or can also be used on picture windows.