Therm-a-Rest MondoKing 3D Sleeping Pad

$229.95 to $259.95
Color:Poseidon Blue
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For the comfiest nights camping on the thickest pad Therm-a-Rest makes, treat yourself to the Therm-a-Rest MondoKing 3D sleeping pad. It provides luxurious warmth and comfort for the frontcountry.

  • Features

    • New for 2020: included pump sack provides faster inflation/deflation
    • 4.25 in. (11 cm) of stabilized loft provides the comfort of home anywhere
    • StrataCore™ construction yields an impressive warmth-to-weight ratio by using a continuous layer of thermal foam nestled between alternating ridges of air and foam
    • Supple stretch-knit fabric provides deluxe breathability and plush surface
    • Vertical sidewalls maximize usable space, creating a giant sleeping surface
    • Foam core delivers all-season warmth to assure a great night's rest anytime
    • StrataCore construction allows the pad to easily compress for easy packing
    • Mates perfectly with other 3D mattresses (not included)
    • TwinLock™ valve uses 2 one-way valves—one for inflation and one for deflation—making setting up and breaking camp a breeze
    • This pad has an R-value of 7.0, which makes it best for adventures in extreme cold conditions; it provides high levels of insulation from ground
    • Most sleeping pads we sell range from 1.0 (good for warm weather) to 5.5+ (for use in extreme cold); the higher the R-value, the more insulated the pad
    • Pump stuff sack included

    Made in USA.

    View all Therm-a-Rest Self-inflating Pads
  • Technical Specs

    Best Use


    Sleeping Pad Type

    Self-inflating Pad

    Sleeping Pad Shape




    Insulation Type

    Open-cell Foam



    Stuff Sack Included


    Packed Size

    Large: 26 x 10.3 inches

    XX Large: 31 x 10 inches

    Sleeping Capacity


    Pad Thickness (in.)

    4.25 inches


    Large: 77 x 25 x 4.25 inches

    XX Large: 80 x 30 x 4.25 inches


    Large: 4 lbs. 6 oz.

    XX Large: 5 lbs. 8 oz.



  • Reviews
    93 reviews with an average rating of 4.6 out of 5 stars

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