Therm-a-Rest - MondoKing™ 3D
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Based on 1 year's data from Feb 10, 2026 How it works
Liked most:
263
66
"20 degrees F comfortably from below. Quilt wasn't up to it"
"Just had my second camp out with it. 0 issues with warmth at 50F , unsurprisingly. Also at 60f I didn ’t sleep hot so that ’s nice too."
"I've used it in May and January, perfection in every season."
14
2
"Plus, being able to adjust the stiffness is a game changer for couples."
"causes much less back pain, and when inflated at the right level, causes no pain."
"It can be super firm or you can let out some air and adjust it to your preference."
21
5
"I had one for about five years that I used extensively, including through the length of California on the Pacific Crest Trail. ... only ever had a problem with leaks at the end of its life."
"almost 3 years later it is still perfect!"
"We’ve had our pads for over 11 years and only this year did we finally “upgrade” to the wider version."
4
0
"if they fail (which out of all the matt's ive had over the years are the most reliable) the customer service is second to none, you will get a replacement."
"For me the thermarest warranty has been worth its weight in gold ... every interaction I’ve had with them has been amazing, no questions asked replacement or repair"
"Ive had both ThermaRest and Nemo send me free replacements when my pad developed a leak"
16
2
"It's super comfy. More comfortable than my bed at home. ... I sleep better on my mondoking XXL than I do on my bed at home. ... this air matress has made a huge difference for me."
"a great night sleep ... am side sleeper"
"I have hip/shoulder issues too. These resolved that."
Disliked most:
70
99
"Me too. And I use Apple Airpods. $$$$$"
"$179 is pretty nuts. ... As long as people keep buying them and paying the esports tax, they're gonna keep selling them at this crazy price. ... The G305 feels really similar, but at 1/3 the price. ... I don't truely understand why the G pro light is all the rage. ... I used a G pro for a week, and while it did feel very smooth and responsive, I also had a G305 that felt very similar."
"Apple is probably the most overpriced product on the market today, including the Airpods. ... you don't need to look very far to find other earbuds that are just as good, if not better, for half the price."
47
75
"Dropped about 9ozs and kicked myself the rest of the way down the trail for being so gullible. ... I could really feel those 9ozs off my back."
"stupidly heavy mondo king pad"
"For pack-in or hiking its FAR too heavy."
48
52
"At the beginning of last summer I bought the xlite and it immediately leaked. ... Used it for about 10 nights and took it back to REI. Never again."
"Returned a tensor after it failed on first use."
"Both times I’ve hiked the PCT my thermarests have popped in the desert . ... My first one had multiple holes and was a write-off."
0
1
"Over time, the Exped began to leak ... As best I can tell, the rubber lining inside the fabric begins to slowly degrade and develop pinhole leaks. ... You never hear leaking air. You just wake up in the morning with your hip touching the ground (I’m a side sleeper)."
0
1
"pillow kept sliding off"
Automatic_Tone_1780 1.0Glad you had success with it! I was super hyped about it from all the accounts of its comfort. Right now my “light” ground sleeping loadout is a klymit insulated paired with Nemo switchback (most comfortable combo I’ve found outside of self inflating) with tarp and bivvy. If I’m going less than 8 miles for an overnight and either the weather is extreme winter or I have a camping partner I haul my stupidly heavy mondo king pad and split the weight of the 3 man tent between us. Been leaning towards just going fully back to my hammmock but I think I’ve determined that I need an open cell/self inflating style pad to prevent hip pain on the ground.
BMThiker 1.0Game changer for us was setting up two Thermarest Mondoking XLs side by side in our tent. Sharing an inflatable mattress is not as fun as you think. Every time someone moves in the slightest the whole mattress moves. On top of that we do have a Kelty double wide sleeping bag.
Two separate Thermarest Mondoking XLs side by side - different air pressures - no waterbed affect when one of us moves/rolls over. Kelty doublewide sleep system (bag).
CozyTurtle55 1.0We also have just two car camping pads side by side! Enough for snuggles without disturbing each other as much. We have Mondo King pads/mattresses. Not sure if they still make them but feel like they were less expensive than the Expeds seem. And option to still use it for a solo trip.
dangerousdave2244 1.0The Exped Megamat is insanely comfortable and keeps you REALLY well-insulated (R Value of 8.1, most cold weather pads are R-value of 5). Not to mention it will last decades before it needs to be replaced, and it's backed up by a lifetime warranty. All expensive sleeping pads are. Ive had both ThermaRest and Nemo send me free replacements when my pad developed a leak The Nemo Roamer is similar, as is the Thermarest Mondoking. But what makes me love the Exped Megamat is that the top layer feels like it stretches, sp the pad contours to your body like memory foam, just less thick https://www.outdoorgearlab.com/topics/camping-and-hiking/best-camping-mattress#an-exceptionally-comfortable-mat
EasternGarlic5801 1.0How much is it ? I have a mondoking xl that I never want to pay that much for again :)
Yeah it’s been great. But car camping only really with it
ExLibris_1 1.0When I’m solo at a state park it’s nice to raise the sleeping pad up. I use a coleman packaway with a thermarest mondoking 3D for a great night sleep. When the SO and baby comes along we use a queen aerobed. Edit: am side sleeper
Green-Confection9031 1.0We use separate air mattresses so we can adjust how we want. Thermarest Mondoking. Expeds are nice too. I think both make double mattresses too if you want to go that route.
Growitorganically 1.0We sleep on two Mondo Thermarest pads strapped together. They’re 5” thick and wider than conventional Thermarests. Very stable and comfortable to sleep on.
Hands 1.0Buying a nice 4 inch sleeping pad (I have a thermarest mondoking) five years ago was a game changer for me when it comes to car camping. I love that damn thing so much, I have no trouble sleeping on a traditional thin thermarest but the 4 inch one is straight up luxurious. It's not even in the same universe as a crappy walmart air mattress
hey_poolboy 1.0XL rooftop tent. She sleeps on a Therma-Rest Mondo King mattress. I sleep on the built in pad in the RTT.
I'm partial to the Therma-Rest Mondo King.
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