Therm-a-Rest MondoKing™ 3D

Running these analyses costs money. Buy through my links to help keep lights on! I may get a small commission.

Overall

#12 in

Sleeping Pads

according to Reddit Icon Reddit

Sentiment score93% positive
27
1
1

Top Pros

Top Cons

Last updated: Apr 13, 2026

Reddit Reviews

Reddit IconBMThiker
12 months ago

Game 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.

7 months ago

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).

Reddit IconCozyTurtle55
7 months ago

We 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.

Reddit Icondangerousdave2244
11 months ago

The 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

Reddit IconEasternGarlic5801
12 months ago

How much is it ? I have a mondoking xl that I never want to pay that much for again :)

12 months ago

Yeah it’s been great. But car camping only really with it

Reddit IconGrowitorganically
7 months ago

We sleep on two Mondo Thermarest pads strapped together. They’re 5” thick and wider than conventional Thermarests. Very stable and comfortable to sleep on.

Reddit IconHands
2 months ago

Buying 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

Reddit Iconhey_poolboy
7 months ago

XL rooftop tent. She sleeps on a Therma-Rest Mondo King mattress. I sleep on the built in pad in the RTT.

8 months ago

I'm partial to the Therma-Rest Mondo King.

Reddit Iconhollis3
11 months ago

I have the MondoKing 3D. Love it, but it isn't the smallest.

Reddit IconIll-System7787
6 months ago

Comfort being your only concern and posting something that is not light in an ultralight forum, I'd recommend the MondoKing 3d by Thermarest. XXL comes in at 5lbs, 8oz. 7.0 R value usable year round. [MondoKing™ 3D | Car Camping Sleeping Pads | Therm-a-Rest® – Cascade Designs](https://cascadedesigns.com/products/mondoking-3d-sleeping-pad) Neoloft is only about 2lbs. But what's the point going light if you can have more comfort. Time to rename this forum r/ultracomfort.

Reddit Iconjamesm137
7 months ago

I use Thermarest mondoking XL and camptime roll-a-cot. Inflatable + foam mattress is very comfortable and you can deflate it to your liking without the air mattress “sinking” to the middle feeling. The cot also has some give to it (also adjustable tension) and can even be slept directly on in hot weather. I usually put 2 bins under the middle. The cot is pretty light compared to most instant ones. Also I bring my usual pillow from home. I honestly sleep better camping. I’ve camped a few times below 0C and no noticeable cold coming through the mattress.