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You might want to look at Reflectix, an thin, well-insulating material used for car windshield shades, among other things. You can get it at any hardware store. My only concern would be that it's...
You might want to look at Reflectix, an thin, well-insulating material used for car windshield shades, among other things. You can get it at any hardware store. My only concern would be that it's...