Thermarest MondoKing 3D


RRP £185.00, Save 15%

Thermarest MondoKing 3D
MondoKing 3D

MondoKing 3D


Thermarest MondoKing 3D

The Thermarest MondoKing 3D is a luxurious mattress with sidewalls, designed to give to most comfortable nights sleep when camping. The sidewalls give the major advantage of increasing the usable sleep surface by 20% as you can now lie all the way to the edge of the mattress without it collapsing and you rolling off onto the floor. It also makes using it with another 3D mattress to create a double bed much easier as they can now be put directly side by side.

At 10cm thick, with an R-Value of 11.4 it provides excellent insulation from the ground and will cope with the coldest temperatures. The foam core means that it is a self inflating mat so there's no need for pumps and batteries, just unroll it, open both the valves (there are 2 to increase the inflation speed) and leave it to do its thing, it will then require a few breaths to get it to the desired firmness. The outer fabric is a supple stretch knit fabric which breathes well to prevent clamminess and give next to skin softness. It also comes with a stuff sac with a carry handle.

Unsure if this is the right mat for you? Please read How to Choose a Sleeping Mat.

Thermarest MondoKing 3D Features

  • 10 cm of stabilized loft
  • Stretch knit outer fabric
  • Vertical sidewalls
  • Foam core
  • Dual valves
  • Self inflating
  • Stuff sac included

Large196 x 63cm10cm66 x 18cm2.5kg11.4
XXL203 x 76cm10cm79 x 18cm3.06kg11.4

Customer Reviews of Thermarest MondoKing 3D

5 out of 55 out of 55 out of 55 out of 55 out of 5 from 5 Reviews

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5 out of 55 out of 55 out of 55 out of 55 out of 5

Reviewer: HappyCamper, Wales  

Two of these in regular every night use inside the house for 9 and 6 months now. Use them every night as a regular mattress with a thin mattress topper.

Only little improvement wish would be to have some sort of handle on the long sides, since the mattress is very slippery to handle when inflated.

5 out of 55 out of 55 out of 55 out of 55 out of 5

Reviewer: Priscilla, Tetbury  

Truly Amazing! Don't hesitate in buying this mattress,trust me it's worth every penny. The only slight pain is that it's quite hard work to deflate and get it back in the bag, so I just partly deflated it and threw it on the back seat of the car, did the rest when I got home!

5 out of 55 out of 55 out of 55 out of 55 out of 5

Reviewer: James, Bedworth  

I haven't used this in anger outdoors in a tent yet but having tried it out inside (where to be honest it will spend most of its time) it's very comfortable and being able to use the valves to control how firm or otherwise the mattress is works very well. The only minor downside is that when its first out of its packet it takes ages to inflate itself, even blown up. I think it is definitely worth getting the 3D if it's for indoor use as the square edges mean it can be joined with another or it can go up against a wall. As others have commented, if weight isn't a concern then going for something thicker like the MondoKing is a good move for comfort.

5 out of 55 out of 55 out of 55 out of 55 out of 5

Reviewer: Debbie, Kingsbridge  

A great mattress for camping. This is our third Thermarest MondoKing 3D. We bought one for our daughter so that we all have the same comfort. Just returned from a Christmas camping trip in the Lake District - lots of snow. The mattresses kept us all warm. We keep our mattresses unpacked during the year as this is the recommended way of storing them. They do take some effort to pack them down for the journey each way but well worth the time for the comfort. We put two together to create a King size bed.

Great service from Facewest. Arrived quickly in time for our trip.

5 out of 55 out of 55 out of 55 out of 55 out of 5

Reviewer: Jan, Somerset UK  

I bought this product because I am 63 years old and take Cub Scouts camping. While younger leaders got up in the mornings complaining of back ache from the hard ground, and how they were frozen all night, I couldn't wait for bedtime. I've never been so warm and comfortable in 30 years of Cub Camps. The mattress was as comfy as my own bed at home; I loved it. It's exactly as it says in the guidance and is not suitable to carry on hikes due to the bulk and weight, but if you're in one camp this is definitely the ultimate luxury. I used a 4 seasons sleeping bag with it because I need a coat at 60 degrees; I feel the cold so much. Can't wait for our next camp.

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