Camp & Comfort


The biggest Therm-a-Rest® mattress ever.

For big comfort and support on a massive scale, the MondoKing™ mattress offers 4 inches (10 cm) of ultra-responsive, body-contouring foam in a pad that maximizes space and comfort. The fabric shell provides next-to-skin softness while the rugged bottom resists punctures wherever you camp, offering long-lasting support for years to come. The MondoKing™ mattress compresses to a surprisingly reasonable travel size and the high-loft foam offers excellent self-inflating properties making set-up a snap. Stuff sack included.

Continue ...


Free shipping on all orders over $100

Available for U.S. addresses only.

Find the nearest stores that have stocked this product within the last six months by simply entering the city, state abbreviation, or postal code, and then clicking GO. We suggest you call the stores listed to confirm availability of the gear you want.


Please choose a product from the dropdown list above to view authorized online dealers.

  • Big Comfort: Stretch out on the huge, soft surface and enjoy big-bed comfort.
  • Warm & Supportive: 4 inches (10 cm) of loft smooths most any surface and delivers ample warmth in any season.
  • Self-Inflating: Compressible foam core expands when unpacked for easy self-inflation.

Therm-a-Rest MondoKing mattress R-value chart

View specs in printer-friendly format
ColorNautical BlueNautical Blue
Weight4 lbs 11 oz / 2.13 k6 lbs / 2.72 k
Width25 in / 63 cm31 in / 79 cm
Length77 in / 196 cm80 in / 203 cm
Thickness4 in / 10 cm4 in / 10 cm
Packed dimension7 X 26 / 18 X 667 x 32 / 18 x 81
Top fabric type75d Polyester Diamond Ripstop75d Polyester Diamond Ripstop
Bottom fabric type75d Polyester75d Polyester
CoreSolid PU FoamSolid PU Foam
Country of OriginMade in the U.S.A. of U.S. and Imported MaterialsMade in the U.S.A. of U.S. and Imported Materials
Made in the U.S.A. of U.S. and Imported Materials

MondoKing Instructions

Select your language: