M-D Building Products 4184 Shrink & Seal 0 Window Insulation Kit, 42 X 62 in, 42 x 62&quot, Crystal Clear 42-by-62-inch shrink and seal window kit fits 1 standard size window Easy to Install around entire window or patio door Shrinks tight and wrinkle free Prevents cold drafts and heat loss through windowpanes Increases R-Value up to 90-percent