Therm-a-Rest MondoKing 3D Sleeping Mat - Large

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Item #: 332051179

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.


  • 10 cm (4") of stabilized loft provides the comfort of home anywhere
  • Vertical sidewalls maximize useable sleep surface
  • Foam core delivers all-season warmth to assure a great night's rest anytime
  • Dual valves allow compressible foam core to expand/inflate when unpacked; just a few breaths top it off to your ideal firmness
  • Mates with another 3D mattress


  • Dimensions: 77" L x 25" W x 4" H (196cm x 63cm x 10cm)
  • Weight: 2.5kg (5 lbs 8 oz)
  • R-Value: 11.4
  • Packed Size: 7" x 26" (18cm x 66cm)

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