I purchased these panels for a large two-story window above my stairwell with the hope of saving some money on my heating bill. I would agree with other reviews in that the coloring is darker than the photos - I ordered the blue and it is more oatmeal/navy. They do have some heft and are silky to the touch. I feel they do help to insulate my space - not entirely but good enough and they are very effective in blocking light.