Reddit reviews Therm-a-Rest MondoKing 3D Self-Inflating Foam Camping Mattress, Standard Valve (2018 Model), Large - 77 x 25 Inches
We found 3 Reddit comments about Therm-a-Rest MondoKing 3D Self-Inflating Foam Camping Mattress, Standard Valve (2018 Model), Large - 77 x 25 Inches. Here are the top ones, ranked by their Reddit score.
Luxury self-inflating foam air mattress offers comfort and warmth for camping, home, and travelMattress provides 4 inches of stabilized loft for the comfort of home anywhere; vertical sidewalls maximize usable sleep surfacePerfect for car camping, expedition basecamps, RVs, and boats, it also makes an excellent guest bed at homeDual valves allow compressible foam core to expand and inflate when unpacked; mate perfectly with a second mattress to create an extra-large sleeping pad for two peopleLarge size measures 77x25x4 inches expanded, 7x26 inches rolled, weighs 5.5 pounds; stuff sack included; limited lifetime warranty; made in the USA
Air mattresses are cold (metal truck bed) compared to foam pads, but backpacking-style foam pads are probably too thin to be comfortable in your truck bed. You might look at an extra thick Thermarest made for car camping. Or for a cheap solution, put a couple of blue moving pads under a cheap air mattress. Can also be used on top as quilts if you find out in the middle of the night your sleeping bags aren't warm enough.
Weather? I don't know. If you try roping a tarp over the bed, if you get any rain at all you will have a waterbed pushing down on top of you after a while. Maybe something like a few feet of 1" dowel rod screwed to a plywood base between your two sleeping bags, to give you a peak to divert the rain off.
Let's clarify the air mattress comment. If it's the kind you'll pump up in your spare room, basically an empty bladder full of nothing but air, it'll suck all of the heat out of your budy as you sleep. Your bodyweight crushes the sleeping bag insulation under your body while you sleep, and that is your primary avenue for heat to escape your body.
Now if we're talking self-inflating air mattresses (filled with foam, which does the inflating), or an air mattress with some kind of insulating value to it, they're fine. Better than fine, actually, they're comfortable and warm and good for cooler temperatures. But you want an air mattress that will insulate more than you want one that is cushy and comfortable.
tldr
get this: https://www.amazon.com/dp/B018APB3TI/ref=cm_sw_em_r_mt_dp_U_MgMRCbXMM8ATD
not this: https://www.amazon.com/dp/B06ZYXN2P2/ref=cm_sw_em_r_mt_dp_U_7fMRCb6M6NZC0
Guys, I bought this: https://www.amazon.com/gp/product/B071X7C4TB/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
I'm not a big guy (5'11" 157lbs) and my arms kept falling off the sides, so unless you are a side sleeper or level the area around this particular mattress, your arms will sag off the sides.
So I then went and bought this: https://www.amazon.com/gp/product/B018APB3TI/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
And found it to be so much better in terms of my arms being able to rest at my sides...but even more how much more lower back support I was given vs that of the tri-fold. The tri-fold felt like it was actually straining my back due to lack of support so I had to put my https://www.amazon.com/gp/product/B014AQ90A0/ref=oh_aui_search_detailpage?ie=UTF8&psc=1 under it, and that only marginally helped.
So I'm ditching the tri-fold.