keeping the heat off the slide if you live in hot weather,OR if you get snow in the winter just close the slides and the snow just slides off and when you go to sell it at some point most people would not do without them(like me) so it makes it a good selling point to a potential buyer..OK the cons: at some point they have to be replaced(not cheap) depends on where you live(My 2004 toppers were still good to go when I sold it 3 years ago but I live in the NW so no super hot sun and they can be noisy in high winds but I just stick a beach ball up there and that stops it,if you do not have them now and want to install them that is a tough choice to make like I said not cheap but myself I would not be without them I just shake my head when my buddy that does not have them is up on the roof after every trip cleaning the junk off before he leaves for home
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