Bunkend Solar Covers

[mike4947]

Well the little direction sheet that comes with the emergency blankets say to put the shiny side toward you to reflect any radiated heat. Yes there is an insulating value from material (very slight...5 mills of mylar and 1 mil of aluminum have an R value of apx .05 ) and the air layer trapped between the canvas and the blanket when used on the roof. but underneath the mattress any value will be from reflected heat. Heat like light can be reflected. The are just different parts of the spectrum.