I am lucky enough?/mad enough?/brave enough? to be heading off for a couple of days camping over Easter. I've bought some aluminium mats to put under our airbeds (metallic one side & foam the other) as I was told this would provide us with a little extra warmth. However, my dilemma is...do we lay them metallic side up to reflect the body heat back up OR metallic side down to repel the cold?? It may sound completely daft but the more I think about it the more uncertain I am! Any help would be hugely appreciated. Thank you