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🛶 Elevate your camp game—sleep like a king, anywhere, anytime!
The Therm-a-Rest MondoKing 3D is a premium self-inflating camping mattress designed for serious comfort and insulation. Featuring a 4.25-inch thick foam core with StrataCore construction, it delivers a high 7.0 R-value for year-round warmth. Its TwinLock valve system simplifies inflation and deflation, while 3D vertical sidewalls maximize sleeping surface area. Compact and portable, it rolls down to 26x10.3 inches and weighs just 4.4 pounds, making it ideal for car camping, basecamps, and even as a luxurious guest bed. Backed by a limited lifetime warranty and made in the USA, it’s the ultimate upgrade for millennial adventurers who refuse to compromise on rest.







| ASIN | B0CQRVLKHB |
| Additional Features | Anti-Deflate, Insulated, Portable |
| Best Sellers Rank | #24,491 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #59 in Camping Air Mattresses |
| Brand | Therm-a-Rest |
| Brand Name | Therm-a-Rest |
| Capacity | 1440 pounds |
| Color | Marine Blue |
| Construction Type | Self-Inflating Foam |
| Cover Material | Polyester |
| Customer Reviews | 4.1 out of 5 stars 77 Reviews |
| Fill Material | Urethane Foam |
| Global Trade Identification Number | 00040818140208 |
| Included Components | Pump Sack |
| Item Depth | 4.25 inches |
| Item Dimensions | 77 x 25 x 4.25 inches |
| Item Dimensions L x W x Thickness | 77"L x 25"W x 4.25"Th |
| Item Display Dimensions | 32 x 11 x 9 inches |
| Item Firmness Description | Adjustable |
| Item Thickness | 4.25 inches |
| Item Type Name | Camping Mattress |
| Item Weight | 4.4 pounds |
| Manufacturer | Cascade Designs Inc. |
| Manufacturer Part Number | 14020 |
| Manufacturer Warranty Description | Limited lifetime warranty. |
| Material | Polyester , Polyethylene (PE) |
| Material Type | Polyester, Polyethylene (PE) |
| Mattress Comfort Layer Material | Comfort Foam |
| Model Name | MondoKing 3D, L - Marine Blue |
| Model Number | 14020 |
| Number of Items | 1 |
| Number of Layers | 3 |
| Number of Packs | 1 |
| Product Benefits | Ultra-comfort, easy inflation, thermal insulation, 3D construction, compressible, stable. |
| Product Care Instructions | Spot Clean |
| Product Dimensions | 77"L x 25"W x 4.25"Th |
| Shape | Rectangular |
| Size | Large - 77 x 25 Inches |
| Special Feature | Anti-Deflate , Insulated, Portable |
| Specific Uses For Product | Sleeping Pad |
| Target Audience | Adult |
| UPC | 040818140208 |
| Unit Count | 1 Count |
| Water Resistance Level | Water Resistant |
| Weight Capacity Maximum | 1440 pounds |
M**F
Truly Comfortable
Bought this based on reviews from many sites (most notably Gear Lab). It is surely something you're not going to backpack with, but for car camping, it truly is almost like sleeping on a regular bed. Used it camping across the country in a tent and never felt any rocks underneath me. Then I used it on the floor in a home (it really is good enough to have as a 'spare' mattress....lower than, say, an aero-bed, but just as comfortable). Deflates and rolls up fairly easily (you do need to roll it tight to get the air out). I am 6' tall and like that the MondoKing is long enough that I can fit length-wise and still have a full pillow at the top end without it falling off.
D**E
not cheap, but absolutely worth it
I'm 54 so I don't camp like I used to. In order to enjoy the day, I really need a good night sleep. I should also add, that I trunk camp, not backpacking or anything. When assembling my gear for the first time, I bought an extra wide cot and memory foam pad (if you've been browsing Amazon for a sleeping pad, I guarantee the one I got has come up in your feed). The cot size took up too much real estate in my 6 person tent, and the pad when rolled up took about 1/3 of the cargo space of my car (it didn't compress). I got a better, more packable cot and this MondoKing to save space in the car for other "glamping" equipment... admittedly, this is not a cheap sleeping pad but I get a good nights sleep and enjoy my camping - and that's the point!!
S**.
Developed a product issues in only two months after purchasing
My $500 mattress top separated from the body and I’m left with this big balloon I can’t even sleep on it anymore.
G**N
Very comfortable and lightweight.
Excellent Camping Mat
B**E
Allowed me to continue to camp with a bad back
The last time I tried to camp, sleeping on the ground wrecked my back. This thing saved one of my favorite past times. A warning, it doesn't pack down, it rolls up, but is still pretty big.
J**N
So comfortable.
I do extended car camping in the Spring each year and finally ditched the air mattress and got a cot. This pad is just super. With the one way valves it's easy to regulate the firmness to just how you like it. It's a perfect size for the cot.I've used it 3 years now I think without any problems so it's pretty durable. The only thing I didn't much care for was the stuff sack which is really a bear to get the pad back into. Why do they do that? Also the bag can be used to inflate the pad. The is an attachment point neat the bottom of the bag that clips to the inflation valve. I managed to tear it out of the bag on my 3rd use. I use a 12v pump now. The pad itself is excellent. The stuff sack sucks.
D**N
At 4" deep it was very comfortable
At 4" deep it was very comfortable while being setup on a hard plywood bench inside a truck top for sleeping. Used a cotton mattress cover to lay a sleeping bag ontop of, plastic/rubber fabric material of the mattress was a little cold. I weigh 230# and did not collapse it to the plywood over a 50 day trip.
J**N
Amazing comfort
This is one amazing air mattress. I have never liked sleeping on air mattresses. This one is a game changer. I am 300lbs and it was so comfortable I slept better on this than on my own bed. Five stars. Highly recommend!!!!
M**N
Superbequem - einfaches Handling
Endlich kann ich wieder schlafen. Handling ist sehr einfach. Ausrollen, eine Weile mit geöffnetem IN-Ventil liegen lassen, ggf. Nachpusten oder mit dem Packsack, der gleichzeitig auch ein Pumpsack ist, Nachbefüllen. Abbau geht schnell. Es ist ausreichend, nur 1x beim Luftablassen zusammenzurollen, der Packsack ist ausreichend groß.
A**R
Actually comfortable
Amazing. The most comfortable air mattress I've ever slept on.
J**D
SUPER IMPRESSIVE
The most comfortable sleeping pad I have ever used or slept on. With an R value of 7 it will no doubt be suitable for all seasons. It feels very durable & the soft, stretchy material just adds to the comfort factor. Sure it packs large & is not exactly suited or designed for hiking or backpacking but after several punctures & leaks with expensive ultralight pads I would much prefer the security of knowing I will get a great nights sleep so I will make the extra bulk & weight work. 5 stars!
H**R
„Endgame“-Luftmatratze
Nicht billig, aber es gibt kaum was besseres in der Gewichtsklasse. Wenn man schon alles andere durchprobiert einen Versuch wert!
O**Z
Best mattress ever
Best mattress ever for camping. We are using these in our RTT and they pack up small and are very comfortable.
Trustpilot
1 month ago
2 weeks ago