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Therm-a-Rest MondoKing 3D

rated 3.5 of 5 stars
photo: Therm-a-Rest MondoKing 3D self-inflating sleeping pad

As a lifelong user and fan, I will no longer buy any of the Therm-a-Rest products or those of its parent Cascade Designs.


  • Good product


  • Terrible customer care

As a lifelong user and fan, I will no longer buy any of the Therm-a-rest products or those of its parent Cascade Designs. Why? They used to stand behind their goods and when one of their top-end pads ($130 in 2018) needed a replacement filler, they simply said we no longer carry that.

Well, when you sell many thousands of a product, you would expect some better consideration of the life of a product for their value customers. As a Scout Leader, you can bet I will recommend a different product.

Source: bought it new
Price Paid: $130

Best pad for car camping


  • Super comfy
  • High R value
  • Easy setup


  • Bulky
  • Heavy
  • Expensive but worth it

I'm not a young chickadee anymore. I bought this pad and I spend a lot of time camping with my son's Boy Scout Troop. My regular Therm-a-Rest from 1998 wasn't exactly doing the job. 

This bad boy is big and bulky but feels like your mattress at home. I don't even need a cot. I live in Upstate New York and as added plus this pad is extremely warm and insulating. 


20 nights on the pad.

Source: bought it new
Price Paid: $225

Great comfy product. Lots of space, feels like home. A bit heavy for backpacking, but then that’s not what it’s for.


  • Comfort
  • Spacious
  • Soft
  • Warmth


  • Heavy

I have the Mondoking 3D xxl size—it’s wide and comfortable. It’s like having my bed from home in my tent. Easy to set up and take down. And what a sleep! Keeps the ground cold away too!


I slept once on my Mondoking! Like a baby. It’s great for car camping and anything, but don’t try to carry it on a trail—it’s not made for that. Just bought last year’s model on sale.

Source: bought it new
Price Paid: $180

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The MondoKing 3D replaced the Therm-a-Rest MondoKing.


Large XXLarge
Price Current Retail: $209.95-$274.95
Historic Range: $89.89-$274.95
Reviewers Paid: $130.00-$225.00
R-Value 7.0
Weight 4 lbs 6 oz / 1.99 kg 5 lbs 8 oz / 2.50 kg
Width 25 in / 64 cm 30 in / 76 cm
Length 77 in / 196 cm 80 in / 203 cm
Height/Thickness 4.25 in / 11 cm
Packed dimension 10.3 x 26 in / 66 x 26 cm 10.3 x 31 in / 70 x 26 cm
Top fabric type 50D polyester knit
Bottom fabric type 75D polyester
Foam type Urethane Foam
What's Included Pump/Stuff sack
Material(s) Polyester, Polyurethane
Country of Origin USA*Built of the Finest U.S. and Global Materials
Product Details from Therm-a-Rest »