Reflective Insulation Foam,48" x 10 Ft Window Insulation for Winter,Aluminum Foil Bubble Insulation Roll for Keep Heat,Window Insulation Kit for RV, Thermal Insulation Cover for Window.

Upon removing the product from the large, soft-padded shipping envelope, I noted that it was folded and not in a roll as shown in the listing. Laying the product flat and letting it relax will make most of the folds go away. It is very easy to work with and can be easily cut or trimmed with a sharp knife or scissors. (for those reading this that might be under 10 years old, go ask your mama before using sharp objects... and never, ever run with scissors.) Where was I at? Oh, yeah... There will be a notable reduction in heat when this material is trimmed and fitted for windows. As a bonus, due to the materials used in it's construction, it keeps light out too so, for the day sleepers, it's a dream come true! Generous size (4' X 10') allows for just about any window sizes. It comes with a lot of Velcro sticky pads as well to complete installation(s). Nice buy at a very reasonable cost. Recommended to all!

Stops heat from coming through window. During the hot summer days, this product kept a room comfortable. It's very easy to install. I have a west facing large bay window and it has always been beastly hot in the summer. I purchased this product and immediately the room was comfortable to be in. I don't know how many degrees it reduced the heat but it felt like a 15 degree drop in temperature at least. I put it up on the window during the hottest time of the day. Then when the sun is low, I pull lightly and it drops gently to the floor. It's a light plastic product so there are no sharp edges.

Purchase item for every and works well. Easy to cut the perfect size needed.

* Good enough for heat reflection in summer, probably. * Good enough for decent insulation in winter, probably. * Half as thick as it needs to be if used as a light blocker for windows illuminated by street lights. * Sticky stickers are individually weak, but that's why a lot are provided. I used 3/4 of them to hold up the sheets. * Easy to cut with scissors. * A 'get what you pay for' deal.

I’ve used this product several times! I’m a shift worker, so keeping my bedroom cool and dark so that I can sleep at night is really important. This insulation helps to do just that! This is the second roll that I’ve purchased, but only because I moved and my windows are different measurements! It’s very durable and weighs next to nothing. I just put my curtains up in front of it and you don’t even know it’s there besides being able to sleep comfortably! We’ve put in in our camper windows as well!

This worked perfectly for my camper windows to keep out the heat from the sun while camping. The roll covered 8 windows and two skylights. (4 large and 2 small and 2x tea small) The Velcro’s dots made installation super easy. Will defintely buy again.

Works but...came folded and not rolled like you'd purchase in the store. Without measuring difference, this foil is a little thinner than I've used in the past on a roll. We cut it for each trailer window and finished off the edges with foil tape. Tip for RVer's, we found attaching a small paper binder clip under several window frame screws made an excellent mounting point to hold the foil in place without movement.

Used these all through the summer. My window gets direct sunlight the majority of the day. It lowered the room temperature by 5 degrees. The only drawback is my house looked like a paranoid person may live inside! I may end up trying room darkening drapes but this is a great inexpensive alternative if you don't want to hang and later wash drapery!

This is not thick enough, so if you are using to block light as well as insulate, get something thicker.

Use it in my camper van for the windows. Works really well to block out heat or keep heat in when it's colder.

Love this stuff. Our bedroom in west facing and above an all brick garage. The sun pouring in, even with blackout curtains caused our bedroom to heat up. This thermal barrier reduced heat by 90%. Easy to cut to size and comes with handy velcro stickers

It is folded not rolled, which is not ideal. No size on the package, so I will have to see how big it is when I get it opened at our trailer.

The product was not what it showed. It came in a bunch of chunks and some of them had cuts in them. Worst product ever and false advertising