Searching the internet for some Tyvek#14 (the soft stuff) in small amounts I found this product called Shiny Gold Norlon at Hang-em High. The description is a gold foil laminated to fabric at 1.7oz/yd. Wondering if anyone has used this product instead of a space blanket for a SuperShelter (SS). It's light, but is it as or more durable than a HeatSheet. At $9.50/yd x 51" it's pricey compared to a HeatSheet of similar size.