From the Manufacturer: Protect the interior of your coach from UV rays and assist with temperature control. Air-filled cells encapsulated in lightweight, flexible polypropylene between two layers of reflective film. Collapses for storage and attaches with hook and loop fasteners for simple installation.
My Experience: I bought the door window covers (Part #45167). I have two doors in my 2017 2185 so I bought two. I like the trailer really dark when I sleep and the two doors and the opaque window always let in too much light. These work great at keeping the light out and the trailer cool. The install took about 5 minutes to install the velcro fasteners and they come off easy to store away. I do not like the silver bubble wrap look from the outside and am going to work on something to place on the inside or spray paint it black. I'll update the post when I decide. For $5.92 each the Camco SunShield are a good purchase. If you like a dark room to sleep in, then you should buy these.
