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Looks like one of those heavier reflective-type windshield shades might work for a lot less-I have one that rolls up just as easy...you could also use it for a ground cover to keep your body heat close on cold nights...
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Reflective laminate = potato chip bags (metallized polyester). There are a lot of materials that will do this cheaply, but it's a great idea that none of us thought of.
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wouldn't a mylar emergency blanket work just as well? not to mention come in a nice folded little package
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What an awesome, simple idea.
I think the curvature of the shield below the chair would be hard to duplicate w/a space blanket and is important to the function.
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