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Review Summary
2025-12-17T19:00:00
This pad is fantastic, I used it on a trip that went from 25C to -1C. The only downside is that it is bulky. But worth it
Vish

2025-12-14T19:00:00
Worked great as a cot pad!
JL S.

2025-12-05T19:00:00
This mattress is the BEST!! Definitely a great addition to my wall tent. I spent 26 nights camping in November.
Callum P.

2025-11-16T19:00:00
Basecamp luxury! Get the largest size to give you lots of moving around room, since you're leaving it at Basecamp anyways.
Ronald D.

2025-10-19T20:00:00
This sleeping pad is incredible! Didn't feel any coldness from the ground and the temperatures were in the mid-low 40's. It was also very comfortable.
COLLIN N.

2025-10-05T20:00:00
Awesome! If you're looking for an at home mattress feeling in a portable mattress, this is it. I've worked in the Outdoor industry for over 30 years and this is the most comfortable mattress I have ever used. Inflating with the stuff sack pump sack combo is brilliant and works well
steve k.

2025-08-18T20:00:00
Best camp mattress for truck camping by far!
ERIC C.

2025-08-13T20:00:00
Good night sleep
Diane G.

2025-08-09T20:00:00
Great purchase, very glad I spent the money. Very comfortable, packs much better than I anticipated and you can make it as firm as you need it or leave a little air out for a softer feel. It also is very easy to inflate.
Anthony W.

2025-07-30T20:00:00
I have a nuCamp Tab 360 and the mondoking 3d XXL is the perfect fit for their twin bed. Used over the top of the cushions in the camper, it makes the bed so much more comfortable. And I love how it rolls up small for easy storage. Way better than a mattress topper.
Lesa

2025-07-26T20:00:00
Is not easy to put back into bag that it came in.
stephen c.

2025-07-08T20:00:00
Very comfortable to sleep on, does take a minute or two to inflate, but that's to be expected with the volume.
Neil B.

2025-07-01T20:00:00
Excellent car camping pad. Self inflates most of the way, minimal noise while sleeping and moving around, and rolls up nicely.
Russell B.

2025-06-29T20:00:00
It was better than my house mattress
Norm C.

2025-05-28T20:00:00
this is an awesome Thermo arrest highly recommend??
Susan B.

2025-05-15T20:00:00
The pad itself is really nice. I got this to replace my Dream Time pad which had gotten pretty well used up. Foam inside was funky, probably had a hole or two. The Mondo King is comfortable, inflates/deflates pretty easily, XXL has lots of room on it. BUT. . . as usual, Thermarest was stingy with the stuff sack! Unless you get all the air out, really compress the pad, rolling it up, it's a real bitch getting it back into the bag! And when it's time to pack up and go, fighting the pad into the sack is a real non fun thing to have to do.
Jerry P.

2024-11-06T19:00:00
This is way more comfortable than your average camping mat. My only regret is not getting the wider width. It is plenty wide enough for one person, but I roll around a lot. Once you find out just how much air to put in for your personal preference, it's perfect. The storage bag that also inflates the mattress is so handy.
Samantha C.

2024-09-25T20:00:00
For any father that has experienced the dad couch/chair in the hospital this mattress is the bees knees and the ducks guts. It turns what I can only explain as an attempt to put the father in as much pain and agony as his wife into a soft delicate cloud bed. This fit perfectly on the dad chair and was complimented by all. Additionally this mattress has performed extremely well camping. Fathers to be this is a neccesity.
AK907

2024-09-25T20:00:00
For any father that has experienced the dad couch/chair in the hospital this mattress is the bees knees and the ducks guts. It turns what I can only explain as an attempt to put the father in as much pain and agony as his wife into a soft delicate cloud bed. This fit perfectly on the dad chair and was complimented by all. Additionally this mattress has performed extremely well camping. Fathers to be this is a neccesity.
Ak907

2024-09-16T20:00:00
How to keep this short... I'm 72. Started back-pack camping in 1966. There were no back-pack camping mattresses, and if there were camping pads, I never saw one. In the early eighty's, as a"die hard" San Francisco bicyclist-skateboarder (Three spinal surgeries: w/ metal rod in 1976, then broke the rod and replaced it with a hip bone graft in 1986) I became passionate about snowboarding. Simply put: I discovered Thermarest sleeping pads and was able to go anywhere someone would let me lie down for the night, and get a good night's rest, then get up and go snowboarding. As a result, I became well employed in the industry. Now, I live on a boat, where I sleep on the Thermarest Mondo King over the standard foam mattress. (The bedside lockers won't open if blocked by a thicker mattress.) So, 40 years with Thermarest. Great memories, and a good back... HAPPY CUSTOMER!
Gil R.

2024-09-15T20:00:00
Easy to use, great quality, comfortable.
Mauricio M.

2024-09-08T20:00:00
Very comfortable and keeps me warm.
Scott S.

2024-08-08T20:00:00
A bit big and bulky, but it's great for summers when my husband and son sleep in a tent in the backyard. We've yet to take it camping but so far they are more comfortable than the air mattress we were using.
Michelle C.

2024-08-07T20:00:00
Used my new Mondo King on a 2-week fire assignment in Oregon. Got some of the most comfortable sleep I ever had while working fire. Bulky to pack, but worth it to sleep soundly. Pad inflates fast, kept air through 60-degree temperature swings, and over a two week trip with no losses.
Gregory B.

2024-07-27T20:00:00
I have tears inside my hip joint that make sleeping very painful and I don't want to stop tenting. This mattress is phenomenally built. I love the StrataCore construction (inserted foam strips) and it's soft to the touch too! It inflates thick enough so I don't feel hard ground, even on my side. I love that I can sleep right on the edge (my dog is a bed hog) and I don't feel any sag either. Yes, it's a bit bigger to backpack, but I'm still out there doing it and not stressing about a painful nights sleep anymore. I have always been a big fan of Therm-A-Rest products. I LOVE their pillow line up too! I also have to mention that it IS easy (and quicker than you think) to inflate with the pump sack. The dual valves are a well designed system of efficiency. So happy that I splurged on this!
Christie

2024-07-09T20:00:00
This is easily the most comfortable real mattress like sleeping pad I have ever had the pleasure of sleeping on. I've been sleeping on XXL Mondo King every night for the last 4 months now due to being on deployment. I haven't woke up with an ounce of back pain. I'm a bit of a side sleeper and I more than comfortable on my side. I think what I love the most about this sleeping pad is the cushy foam layer that lines the top makes this feel as much like a real mattress as possible. The best part? Being able to pack it away as convenient as possible. Is it the smallest pack size? Definitely not but the comfort this guy gives is unmatched. The pack size is worth it. I would highly recommend this to car campers any day. If you can afford the weight and space, this is the sleeping pad for you!
Enrique

2024-06-25T20:00:00
I sleep outside a lot in a cowboy style bedroll. I have slept on memory foam for years but recently purchased a MondoKing XXL. Best, most comfortable mattress I've ever slept on. Hands down. Also it is very easy to manage and it is lightweight by bedroll standards. Great product.
Lynn M.

2024-06-22T20:00:00
Have had for 3 years, best sleeping pad I've ever owned. Durable. Comfortable. Easy to set up.
A

2024-04-13T20:00:00
I gave this bag a full five-star review. I used it for many years, and it just needed replaced. So I bought another one. Previous design had a smooth surface. New design has ridges on the surface, and I can feel them, so I need a pad for the pad. Doesn't make sense. Why the change? It wasn't for loyal users. Poor redesign. I am disappointed with the change from a wonderful pad to new design.
Tini

2024-02-29T19:00:00
I would have given this sleeping pad five stars but at almost $300 and it not being perfect, it gets a four star review. Yes, it is super comfortable and fairly easy to inflate. However, after a few uses the pad, even with the valve open and being rolled up several times to get all the air out, won't fit in its stuff sack any longer. This is for easy car camping and the like and it's supposed to be easy to put back in the stuff sack. It's impossible! I remedied the situation by buying a jumbo laundry backpack sack for college students and can put the pad and inflation sack/stuff sack in there and now it's easy! Thank you for the very comfortable sleeping pad! However, it is a little pricey!
Koren G.

Gil d l R
By Gil R.
How to keep this short... I'm 72. Started back-pack camping in 1966. There were no back-pack camping mattresses, and if there were camping pads, I never saw one. In the early eighty's, as a"die hard" San Francisco bicyclist-skateboarder (Three spinal surgeries: w/ metal rod in 1976, then broke the rod and replaced it with a hip bone graft in 1986) I became passionate about snowboarding. Simply put: I discovered Thermarest sleeping pads and was able to go anywhere someone would let me lie down...
View full Review
Changed design disappointing.
By Tini
I gave this bag a full five-star review. I used it for many years, and it just needed replaced. So I bought another one. Previous design had a smooth surface. New design has ridges on the surface, and I can feel them, so I need a pad for the pad. Doesn't make sense. Why the change? It wasn't for loyal users. Poor redesign. I am disappointed with the change from a wonderful pad to new design.
Immerse yourself in the ultimate sleep experience in any terrain or weather with the MondoKing 3D from Therm-A-Rest. Our pinnacle of comfort and support, the MondoKing 3D provides an impressive 4.25 inches (11cm) of premium foam. This ultra-luxurious sleeping pad boasts a plush feel against your skin and a robust 7.0 R-value for superior warmth in all conditions and seasons.
Incorporating StrataCore construction, this pad offers a three-dimensional loft while maintaining a compact design, perfect for saving space in your car trunk or storage closet. The MondoKing 3D is a self-inflating wonder featuring the user-friendly TwinLock valve. This innovative design allows for rapid inflation-three times faster-and deflation-five times faster.
Like all Therm-A-Rest pads, the MondoKing 3D is manufactured domestically, ensuring top-notch quality and minimal environmental impact.
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