Love these curtains, they are thick and insulated enough that help block the cold air that comes through yet keeps the home insulated and warm in the winters.  In the summer, it keeps the heat on the outside and cool inside.  I loved them enough to buy a few more to give a bit more plush look to the window treatment section that we have with our sliding door area.  Gave this review a 3 as the color was a bit darker than the image and it didnt match exactly the same set that I had before but Natural is Natural and will work with my decor, the color lot may have been off just a bit.  It's all good.