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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...
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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...