Top Rated Gear

Therm-A-Rest MondoKing 3D Sleeping Pad XX-Large

SKU: TARMK3DPXXL MFR: 14021

Key Features

  • Enjoy supreme comfort with this Therm-A-Rest sleeping pad, perfect for camping trips.
  • With an R-Value of 7, this insulated pad ensures warmth in cold weather conditions.
  • The durable polyester fabric of this camping pad stands up to rugged outdoor use.
  • This self-inflating sleeping pad offers ease of use, making setup a breeze on arrival.
  • Packable design makes this lightweight sleeping pad ideal for backpacking adventures.
  • Experience the 4.25" thickness for superior support & a great night's sleep outdoors.
See More Product Details
Free Shipping

See Options

1

Protect your gear with Protect+.* Learn more

1 Year

$34.99

2 Year

$54.99

3 Year

$69.99

Available to U.S. customers only.

Need help? Ask our experts.

Overview
Compare
Specs
Q&A

Questions & Answers

Shopper : Why Did You Choose This?PETER F : I have four of these already, my family has found them to be the best camping sleeping pads we have ever used. This is high praise has my wife get a good nights sleep!

Reviews about this item

Review Summary

2024-11-06T19:00:00

Rated 5 out of 5

Comfy

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

Rated 5 out of 5

Man's best friend

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

Rated 5 out of 5

Man's best friend

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

Rated 5 out of 5

Gil d l 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 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

Rated 5 out of 5

Awesome Sleeping Pad

Easy to use, great quality, comfortable.

Mauricio M.

2024-09-08T20:00:00

Rated 5 out of 5

Very comfortable and keeps me

Very comfortable and keeps me warm.

Scott S.

2024-08-08T20:00:00

Rated 4 out of 5

The Cadillac of sleeping pads

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

Rated 5 out of 5

Most comfortable camp sleep ever!

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

Rated 5 out of 5

Fantastic Mattress for Many Reasons - I can tent again!!

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

Rated 5 out of 5

A solid mattress away from home

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

Rated 5 out of 5

Lynn Miller.

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

Rated 5 out of 5

A M

Have had for 3 years, best sleeping pad I've ever owned. Durable. Comfortable. Easy to set up.

A

2024-04-13T20:00:00

Rated 5 out of 5

Changed design disappointing.

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

Rated 4 out of 5

MondoKing XL

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.

2024-02-24T19:00:00

Rated 5 out of 5

Camp and comfort

I have owned this pad for 5 years or so. Use it at least 2 times a year and just this year took it out on a ruck into the woods on a -15°F overnight. Honestly I'm incredibly impressed. I'm 6'2" 200lbs and I have spondylothesis of my L1 among other issues in my spine that cause me to toss and turn quit a bit. This pad delivers the support you need and the space for me to adjust my body without sliding off. While sleeping in the cold I never once noticed any coldness from my pad. With it in the bag and strapped to my pack, this pad made it through the brush and thicket. Although my bag did suffer a hole here or there, probably due to thorns, my pad was in touched. I couldnt be happier with my purchase as I am using it now while I type this in replacement of my current bed until my new mattress is delivered.

Adam

2024-02-11T19:00:00

Rated 4 out of 5

Very Comfortable, hard to connect the inflation bag

This is an exceptionally comfortable pad. It's thick enough to provide a wide range of adjustments so you can dial it into your preferred firmness. The pad is quiet when moving around on it, and makes a great base camp/ car camping pad. It seems to be pretty durable for the weight, and well constructed. My one complaint with this pad is the connection between the inflation sack (included), and the valve on the pad. It takes a bit of fighting to get it connected, and I am worried that either the valve is going to break, or I am going to poke a hole in the material during the connection process. This may improve with wear, and currently, it's a pain to make work. Overall a very good product.

Mike S.

2024-02-07T19:00:00

Rated 3 out of 5

Pump sack connection

Wish I'd paid attention to the pump sack complaints. My pad is in the shop, attaching and removing the sack is a nightmare. The pad valve pulled out after 5-6 uses. The pad is as comfortable as you'll find. For the cost of this thing you could put something with threads or more pliable plastic. Most campers are armchair engineers but when it comes to sleep I want to sleep. Not jack with 'high quality' design issues.

Carl

2023-12-20T19:00:00

Rated 5 out of 5

Awesome

This thing is awesome. Luxurious sleeping on the ground. There's no Basecamp mattress comparable.

Dovid Y.

2023-11-17T19:00:00

Rated 3 out of 5

I think you folks could

I think you folks could come up with a better inflation valve fitting. Stuff sack fitting is cumbersome. I mickey moused a fitting so I may use a bike inflation pump. These mattresses are to my mind costly enough you could devise a better valve fitting. The mattress does not inflate itself without assistance with compressed air. Breath air puts moisture inside which may over time cause mildew. Mattress is comfortable, nice job there. Quick shipping and perfect construction are appreciated. The inflation/stuff sack interface could be improved. Nice to see something made in USA. Best Wishes. Glen

Glen H.

2023-11-10T19:00:00

Rated 5 out of 5

Worth it!

The most comfortable camping mattress I've used, and I've used plenty. It is obviously large and heavy, but it is worth it for many trips. l canoe trip, and portages are easier when one is very well rested, or, put another way, I'd rather "suffer" an extra few pounds for 30 minutes than have an ultralight mat for eight hours. Typical ThermARest build quality, quiet, warm, easy-to-use.

tim l.

2023-11-10T19:00:00

Rated 5 out of 5

Worth it!

The most comfortable camping mattress I've used, and I've used plenty. It is obviously large and heavy, but it is worth it for many trips. l canoe trip, and portages are easier when one is very well rested, or, put another way, I'd rather "suffer" an extra few pounds for 30 minutes than have an ultralight mat for eight hours. Typical ThermARest build quality, quiet, warm, easy-to-use.

Tim L.

2023-11-01T20:00:00

Rated 4 out of 5

XS person vs XXL MondoKing? 3D

As comfortable as home. As a 107lb older woman, the XXL is perfect for comfy car camping, and could make a great guest bed. Rolling it back up for its transport bag is a bit of a wrestling match. My solution: After sealing the "air in" valve, and opening the "air out" valve, roll it up twice. First time get most air out, then unroll, and and second time finishes the job. For a small person, though, be prepared to put all your weight on it, and some muscle too. Literally sit on it while rolling. Awkward but it works, and I'm glad to have this nice pad. The one-way valve system is a key feature and allows re-rolling without losing progress. NOTE: I don't recommend for really chilly (freezing) nights if you're small, as it takes a long time to warm the large pad up. A thin insulating layer between you and pad may help.

Lizann M.

2023-10-01T20:00:00

Rated 5 out of 5

Great product. Easy purchase process.

Great product. Easy purchase process.

BRENDA W.

2023-10-01T20:00:00

Rated 5 out of 5

Great product. Easy purchase process.

Great product. Easy purchase process.

Brenda W.

2023-09-11T20:00:00

Rated 5 out of 5

Deluxe Car Camper

Purchased this pad for sleeping in the bed of my truck. It's heavy and durable enough to get thrown in with a bunch of other equipment. It doesn't pack down particularly small, but easily small enough for the trunk of a car or back of an extra cab truck. The storage bag which also doubles as an inflation sack is a really great feature; just let it self-inflate and then add 3-4 sacks of air and it's ready to go. The surface of the pad has a soft chamois feel to it, not like a sticky backpacking pad. Overall, great product for car camping if you have the space to bring it along.

Matthew B.

2023-08-08T20:00:00

Rated 5 out of 5

These things is almost more

These things is almost more comfortable than our Casper mattresses at home! Got 4 for all of us and everyone loves them.

Mark G.

2023-07-31T20:00:00

Rated 5 out of 5

Big, soft, comfy!

This is the King of air mats! Though it's primary use is car camping (in luxury!), I make space for this beast on rafting trips. It's remarkably lightweight for its size. The adjustability on firmness is pretty amazing as well.

Chad N.

2023-07-31T20:00:00

Rated 5 out of 5

The BEST sleeping pad ive had in my 45 years of packing

Combined with the Vesper 20 quilt, this MondoKing 3D sleeping pad yielded the very best sleeping system ive ever had. This MondoKing 3D pad is AMAZING!!!!!! I never thought such a wonderful pad ever exisited. There is nothing like it out there. Well worth the money!

Philip S.

2023-07-30T20:00:00

Rated 3 out of 5

Stuff sack 'Made in China'. Failed almost immediately.

I ordered two of these. The pads are great, but both of the stuff sacks ripped almost immediately in the same place where the carrying strap attaches near the open end. Looks like the seams are very poor, with barely any material under the stitches. I had to send back under RMA. I was also disappointed to see "made in china" on a small tag inside the stuff sack, which also says "USA Built" on the outside.

Eric K.

2023-07-22T20:00:00

Rated 5 out of 5

J'ai utilisé mon matelas à

J'ai utilisé mon matelas à quelques reprises. Il est très confortable. Il est aussi très facile à dégonfler et à rouler. Je suis très satisfaite de mon achat. Pour le camping en voiture ou pour la visite à la maison, c'est un bon matelas.

Madeleine M.

Therm-A-Rest MondoKing 3D Sleeping Pad Specifications

  • Color

    Marine Blue

  • Material

    Polyester, Polyurethane

  • Fabric

    Top: 50D polyester knit
    Bottom: 75D polyester

  • R-Value

    7

  • Thickness

    4.25" (11cm)

  • Dimensions (W x L x H)

    Product: Large: 25 x 77 x 4.25" (64 x 196 x 11cm)
    XXLarge: 30 x 80 x 4.25" (76 x 203 x 11cm)

    Packed: Large: 10.3 x 26" (66 x 26cm)
    XXLarge: 10.3 x 31" (70 x 26cm)

  • Weight

    Large: 4 lbs 6 oz (1.99kg)
    XXLarge: 5 lbs 8 oz (2.50kg)

  • UPC Code

    040818140208

About Therm-A-Rest MondoKing 3D Sleeping Pad

FEATURED REVIEWS

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.

Therm-A-Rest MondoKing 3D Sleeping Pad Features

  • Stable Comfort: 4 inches (10 cm) of stabilized loft provides the comfort of home anywhere
  • StrataCore Construction: Yielding an impressive warmth-to-weight ratio, StrataCore uses a continuous layer of thermal foam nestled between alternating ridges of air and foam.
  • Comfortable Fabric: Supple stretch knit fabric provides deluxe breathability and plush surface
  • Giant Sleep Surface: Vertical sidewalls maximize useable sleep surface
  • Incredibly Warm: Foam core delivers all-season warmth to assure a great night's rest anytime
  • Easy to Pack: StrataCore construction allows the pad to easily compress and pack away
  • Mateable: Mates perfectly with other 3D mattresses
  • TwinLock Valve: Utilizing two one-way valves, one for inflation and one for deflation, the TwinLock valve system makes setting up and breaking camp a breeze

Warranty Information

This product has a limited lifetime warranty.

Key Features

  • Enjoy supreme comfort with this Therm-A-Rest sleeping pad, perfect for camping trips.
  • With an R-Value of 7, this insulated pad ensures warmth in cold weather conditions.
  • The durable polyester fabric of this camping pad stands up to rugged outdoor use.
  • This self-inflating sleeping pad offers ease of use, making setup a breeze on arrival.
  • Packable design makes this lightweight sleeping pad ideal for backpacking adventures.
  • Experience the 4.25" thickness for superior support & a great night's sleep outdoors.

What's in the box:

  • MondoKing 3D Sleeping Pad
  • Pump Stuff Sack
  • Therm-A-Rest Lifetime Limited Warranty