Yens 1/2"x 24"Large Bubble wrap 125ft,125ft x 24 inch Large bubble perforated wrap(BL-24-125)

Used to insulate windows --- fast, cheap and fairly effective solution. Just to be clear, it isn't totally effective and doesn't cut 100% of the heat, but I feel it will be better than the shrinkwrap plastic window insulation kits. I will have to augment with other insulation for the 3 hottest months, but the remainder of the year, this will be fine and still allows light to come in. I did use double layers on west facing windows. We have extreme heat, by the way - it probably would be good enough for more reasonable climates.

The product was exactly as described. It was packaged and shipped well. I purchased it for window insulation.