3M Indoor Window Insulator Kit Insulates 5 - 3'x5' Windows

I am amazed at how well they work. I would definitely recommend this product

There are many different brands out there - however - this is the best.

disliked that many items were not available but many were so I liked that seems that many items could have been combined for shipping. Never really know when you can expect delivery and some take a long time. All in all very easy compared to other shopping methods. free shipping is awesome

This product really works. I was hesitant at first but the finished application was great, the view was clear through the plastic, not milky like some plastics. Easy to apply. I would recommend this to a friend, and have.

BAD: 1. Plastic comes as 1 big piece which was a lot of work to cut as I had to clear my entire living room to open it up and spread it out to be able to cut to size. It would have been better if they were pre-cut at the factory with the size indicated in the box. 2. The included double-sided adhesive does not have enough length to install the insulation on 5 windows. A pack comes with 2 rolls and still short. I bought 2 packs and I had to steal one roll from another pack to finish. 3. The backing on double-sided adhesive can be a pain when removing it when you have already applied one side to the window frame and you are ready to mount the film. Especially when your windows are not flush with your drywall. Have a pocket knife or any sharp object at the ready to gingerly separate the two. GOOD: 1. 3M quality. Installed it in the middle of fall 2021 so will still have to determine if insulation is good come winter time.