Therm-a-Rest MondoKing 3D Sleeping Pad

Item No. 04081810762
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Product Description

Forget peas, with the Therm-a-Rest MondoKing 3D Sleeping Pad inflated beneath your toasty sleeping bag, you won't even notice if you've set up camp on a field of frozen rocks. The biggest pad yet in Therm-a-Rest's collection, it's designed for the utmost comfort camping in any season. Vertical sidewalls enhance the MondoKing's sleeping surface by 20 percent, and the foam core ensures winter-worthy warmth.

Therm-a-Rest's largest sleeping pad provides the comfort of home
High R-value delivers warmth during the coldest nights
Dual valves ensure speedy inflation at the campsite
Compressible foam core packs down efficiently
New and improved stuff sack includes easy-carry handles

Material75D polyester, urethane foam
Style: self-inflating
Shape: rectangular
R-Value: 11.4
Temperature Rating-40F
Stuff Sack: yes
Packed Size:[large] 26 x 7in,
Claimed Weight:[large] 5lb 8oz

Customer Reviews

4.8 / 5.0
14 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Looking forward to sleeping on it soon
I haven't used my new thermarest yet but it inflated well and looks good. Great delivery.
May 23, 2019
Originally posted at
Takes some getting used to - but amazing
First time I used this was along the IceFields Parkway in Canada in January. In super cold temps, this doesn't self inflate. However I wasn't cold once it was fully inflated (blew it up). Low temps in January were low single digits, warm for this time of year for Canada.

Fast forward to last month here in the SouthWest. Was on a week long trip, and it self inflates as it should! I believe anything lower than maybe 40 degrees it will have issues with the foam expanding to self inflate. Not once did I wake up to a deflated pad, in either Canada or here in Utah; much like many backpacking pads at low temps, which is normal.

The secret to get the pad back in the stuff sack is to roll it up with authority, then do it again. Amazing how small it is brand new, and then trying to get it that size again. Do it twice, and it is MUCH easier.

Hope this helps.
April 16, 2019
Originally posted at
The best for comfort
I have the non 3-d version. I am sure the latest iteration is just as good. If you want a good nights sleep in your tent and need to adjust the amount of "give" then this is the one to get. When not used camping it is used for stop-overs at home who compliment how comfortable it is. I like it so much I bought a 2nd one.
January 19, 2019
Originally posted at
Sooo comfortable
Bought 4 years ago and used every summer camping with the family, mostly on Corsica. Recommend not to inflate too much or it becomes too hard, find the sweet spot and enjoy.
January 16, 2019
Originally posted at
I would recommend this product
Used mainly for my van set up. It just perfectly sized and comfort was wonderful. Easy enough to pack and unpack. It was also used by guests visiting and they really enjoyed the comfort.
December 13, 2018
Originally posted at
Highly recommend for a tall person
Perfect for my van! Super comfy and durable!
December 13, 2018
Originally posted at
Fancy campin'
5 stars for comfort. I probably didn't need to get the XXL (it barely fit in the van), but dang is it luxurious. Bonus points: it doubles as a pretty awesome inflatable guest bed.
December 7, 2018
Originally posted at
Really comfortable
Really comfortable for a bigger guy.
December 5, 2018
Originally posted at
Very Comfortable Mattress
Took this on a 7 day deer hunt at 6200 feet, nights in the mid 20's days in the low 60's. I have to say this was a very comfortable mattress!! The only problems I had were all self inflicted as I did not let it inflate before I took it out so it took a long time to inflate on initial setup. Since I did not pre-setup the mattress I had a hard trying to deflate the mattress at the end of the trip. I got the mattress home looked at the video and VOILA it worked like a charm if you follow the directions!!!

Thanks Thermarest for making a great product!!
October 25, 2018
Originally posted at
As comfortable as my bed... because it is my bed.
Having, in my young adult life, topped out at a respectable 6'2", I decided it was time to move on from the twin bed that I've been using literally since the moment I outgrew my crib. After doing about 20 minutes of mattress shopping, I discovered mattress shopping wasn't for me. When I realized that one of these in the XXL size is exactly half the size of a queen mattress, I took the plunge, ordered two, put them in a sleeve to hold them next to each other, threw on a queen memory foam topper and some sheets, and called it a day. Little did I realize that the result would be the most comfortable bed I've ever slept in. It was significantly less expensive than a traditional mattress, and when I go car camping, I can bring one with me and experience the comfort of my own bed in the woods. As an added bonus, I can inflate the two pads to different firmnesses when my girlfriend sleeps over. Yep. It's basically a sleep number bed. 10/10 would recommend this strategy for comfort-conscious dirtbags everywhere.
September 12, 2018
Originally posted at