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Sorry!  This item Is out of stock.  ( Thermarest - Mondo King 3D Mattress )

Thermarest - Mondo King 3D Mattress

Availability: Out of stock

Stock #: D47N-
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Are you always on the lookout for something bigger and better? Your ship has arrived with the MondoKing 3D. Simply put, the MondoKing™ 3D is the biggest Therm-a-Rest® mattress ever. Vertical sidewalls create 20% more usable sleep surface so you have room to sleep like starfish. Dual valves allow compressible foam core to expand and inflate quickly when unpacked. A new and improved stuff sack with easy-carry handle is also included.


  • Comfort: 4 in (10 cm) of stabilized loft provides the comfort of home anywhere.
  • 20% More Sleep Surface: Vertical sidewalls maximize useable sleep surface.
  • Incredibly Warm: Foam core delivers all-season warmth to assure a great night's rest anytime.
  • Self-Inflating: Dual valves allow compressible foam core to expand/inflate when unpacked; just a few breaths top it off to your ideal firmness.
  • Mateable: Mates perfectly with another 3D mattress.


Size L
Color  Blue Depths Blue Depths
R-Value 11.4 11.4
Weight 5 lbs 8 oz / 2.5 kg 6 lbs 12 oz / 3.06 kg
Width 25 in / 63 cm 30 in / 76 cm
Length 77 in / 196 cm 80 in / 203 cm
Thickness  4.0 in / 10 cm 4.0 in / 10 cm
Packed dimension 7.0 x 26 / 18 x 66 7.0 x 31 / 18 x 79
Volume 7700 cu. in 9600 cu. in
Top fabric type 75d Reverse Diamond 75d Reverse Diamond
Bottom fabric type 75d Polyester 75d Polyester
Foam type Urethane Foam Urethane Foam
Country of Origin USA*Built of the Finest U.S. and Global Materials USA*Built of the Finest U.S. and Global Materials

Product Videos

  • Therm-a-Rest® Self-Inflating Mattresses

  • Using Your Self-Inflating Therm-a-Rest® Mattress

  • How to Care for Your Therm-a-Rest®