Amazon Intex 64417ED 22in Queen Dura-Beam Air Mattress, High-Rise, Comfort Plush, Built-in Pump, 600lb Capacity - Ideal for Travel & Camping $64.99 @Amazon

All this talk about insulation takes me back—when I was doing shifts in remote clinics, it was always a foam pad or whatever blanket I had under the air mattress or cot, or else you’d wake up with your bones aching from cold seeping right through. Glad to hear the mylar blanket works if you can handle the crinkling; it’s
 
Can’t overstate how much that bit of “give” improves sleep and seems to extend the life of the mattress. Foam pad underneath is a staple for me too, both for warmth and puncture protection—learned that lesson quick after a stray twig tried to ruin my weekend. Mylar blanket trick works, but yeah, it’s a little crinkly and can get some
 
Layering a mylar blanket under the mattress really does ramp up the warmth—done that on a chilly night when temps dipped way lower than expected. It’s a bit noisy, sure, but I’ll deal with crinkles if it keeps me from freezing. Haven’t had big issues with moisture, but I’ll usually air things out in the morning just in case. Anyone here tried sandwiching foam and mylar together for even better insulation?