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Therm-a-Rest

Therm-a-Rest MondoKing 3D Self-Inflating Camping Sleeping Pad

Based on 799 reviews
Condition: New
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$249.95

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At a glance

Condition
New
Size
Large - 77 x 25 in
Style
Original Storage Bag
Model
MondoKing 3D
Capacity
1440 lb
Color
Lyons Blue
Target Audience
Adult
In the box
Sleeping PadPump SackStorage Sack
Warranty
Manufacturer’s limited lifetime.

Features 7

  • Camp like royalty with the MondoKing 3D, an ultra-comfy 4.25-inch thick sleeping pad with a stretch knit fabric layer for resting better under the stars
  • Utilizing two one-way valves, one for inflation and one for deflation, the TwinLock valve system makes setting up and breaking camp a breeze
  • 7.0 R-value insulates in the most extreme conditions using StrataCore construction that utilizes a continuous layer of thermal foam nestled between alternating ridges of air and foam
  • 3D construction creates vertical sidewalls to maximize useable sleep surface and comfort

Specs 25

Size Large - 77 x 25 Inches
Special Feature Portable, Quick Deflation, Quick Inflation
Brand Therm-a-Rest
Color Lyons Blue
Product Dimensions 77"L x 25"W x 4"Th
Specific Uses For Product Sleeping Pad
Target Audience Adult
Model Name MondoKing 3D

Frequently asked questions

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View our full returns policy here.

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Top Amazon Reviews

Best camping sleep for the money.
Size: XX-Large - 80 x 30 Inches Style: Original Storage Bag
The only thing I dislike about this, is that it didn't exist sooner. 😂 Easily the best camping air mattress I've ever used. It felt like sleeping in my own bed, because of the foam, it's great. I slept well, all night, on the ground, in the woods. No tossing and turning, and I felt rested in the morning. It's not loud or makes weird noises when you move around on it, and it feels soft to the touch instead of plastic or something. It will basically self inflate, but the bag it's stored in can be used as a pump, which is neat, but I bought the tiny pump for it. Inflates in under 10 minutes I think. It's a bit bulky, not for backpacking but if your worried about your back and want to camp, use this mattress, my 75yo dad approves. 👍 It seems well built and can support my fat butt so I recon it will yours too, and be comfy. 🥰 ... show more
Reviewed in the United States on September 6, 2024 by Raijiin
Most comfortable
Size: Large - 77 x 25 Inches Style: Original Storage Bag
Consider me the princess of the princess and the pea. I’ve tried everything. I had settled on bringing an air mattress when camping. But I was frustrated by 2 things: the cold and having to inflate it multiple times. Never mind how big it is and the fact that I needed a separate tool to inflate them. I have tried many sleep pads from Amazon and with each one, I woke up multiple times during the night with soreness. I didn’t inflate this all the way the first time, and I didn’t know what all the fuss was. I added more air and WOW! It not only helps to keep your body heat from being sucked out, but the comfort is unreal. I never felt the ground and my joints felt supported. It is easy to inflate, let it do it’s thing, then add manually to your firmness preference. It’s also super easy to deflate and it packs smallish. If you are having trouble getting comfortable camping, buy this. It’s a game changer for car camping. ... show more
Reviewed in the United States on October 31, 2022 by Kathleen Humiston
Perfect Car Camping Mattress
Size: XX-Large - 80 x 30 Inches Style: Original Storage Bag
I have used this mattresses a couple of times, and it is now my favorite one for car camping. Since it is well insulated it keeps you warm in colder weather. The larger size means plenty of room, and it is comfortable. Seems very durable too, unlike the standard air mattress I used before that got multiple holes in it when the plastic got old after a few years. The Thermarests seem to last forever. ... show more
Reviewed in the United States on June 1, 2024 by Brent
The most comfortable sleeping pad I have used.
Size: XX-Large - 80 x 30 Inches Style: Original Storage Bag
The Mondoking is hands down the most comfortable sleeping pad I have had the pleasure of using. I backpack and camp a lot where I live in Colorado. With the weight it is by no means a backpacking pad, however, it is amazing while car camping with my family. If you don't have to hike too far, a few miles even, this is amazing. Anything beyond that, I would recommend more of a backpacking inflatable pad. It is SUPER comfy and SUPER warm. The coldest I've slept on it so far is about 18°, zero cold spots whatsoever. I'll give an update after torture testing this when I winter camp later this year. Great buy! ... show more
Reviewed in the United States on November 4, 2024 by Cody Clement
“IN” valve is not one-way, as stated in instructions
Size: XX-Large - 80 x 30 Inches Style: Original Storage Bag
*** Update - ThermaRest got back to me and sent two replacements. The valves on the new pads work properly. The INFLATION section of the TwinLock Valve Instructions states that “The one-way IN valve will prevent air from escaping”. This is not true. While inflating with the pump sack, when you get above approximately 50 % inflation, every time you pump air in, you can hear it come right back out after you stop pumping. This makes it very difficult to fully inflate. Also, if you put light pressure on the pad with your hand, you can hear the air coming out. I have two pads that I bought at the same time and both have the same issue. I emailed ThermaRest 9 days ago with this issue to see what they’d say, but I still haven’t heard back from them. ... show more
Reviewed in the United States on July 19, 2024 by Dan
Comfort in Camping
Size: XX-Large - 80 x 30 Inches Style: Original Storage Bag
Easy to use and very comfortable sleep. It is quite large when rolled up, so if you're looking for something more compact this isn't it. The trade off for the large size is the comfort. No more cold nights and deflated air mattresses!!
Reviewed in the United States on June 7, 2021 by Amanda
Comfortable
Size: Large - 77 x 25 Inches Style: Original Storage Bag
This had a reputation of being very comfortable, and I agree. I have it on a cot in a back room of my apartment. I've slept on it a few times, and find it almost as comfortable as my bed. I sometimes travel cross-country on adventures, and sleep in the back of my car, a Subaru Outback. I haven't tried it in the car yet, but I'm sure it will be more comfortable than things I've used in the past! It fits in half of the rear cargo area, with will work with some tricks & adjustments for my height (6 ft.). It could easily be moved from my car to a tent. One trick to consider. don't overfill it. I found it much more comfortable after I took a bit of air out of it. ... show more
Reviewed in the United States on September 3, 2024 by j higbee
air leak after 3 times use and no support from company
Size: Large - 77 x 25 Inches Style: Original Storage Bag
I bought two Therm-a-Rest MondoKing 3D Self-Inflating Camping Sleeping Pad from Amazon.com on 6/25/2023. My wife and I have used them only for 3 times. It turned out that one sleeping pad is slowly leaking air. At night, before I was using it, I pumped air until it was a kind of firm and supportive. However, in the next day morning, the pad became not firm at all, and I can even touch from the top surface to the bottom without much force. I submitted my first request for replacement of the pad (it is still under warranty) at the company's web site on 12/23/2024 and there has never been replied by the company customer support personnel except the automatic reply. Then I submitted another same warranty request on 1/9/2025. Up to now, no reply at all. What a worst experience with this product and the company warranty supports. ... show more
Reviewed in the United States on January 15, 2025 by An Amazon Buyer
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