A note to our community regarding COVID-19
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Update: April 3, 2020

In support of the medical teams fighting to protect our health, we have transitioned our Seattle manufacturing to produce ASTM Level 1 masks for 51 hospitals in the Providence network. The materials are being provided by Kaas Tailored, and we’re humbled to join their efforts to meet the needs of the heroic healthcare community. All masks are allocated to aid in the personal protective equipment (PPE) shortage. We will not be selling masks directly at this time.



To our Cascade Designs family,

As the world changes rapidly around us, we hope that you are safe and able to enjoy the rejuvenation of the outdoors in a responsible way. Our teams at Therm-a-Rest, MSR, SealLine, Platypus and PackTowl are focused on protecting the health and wellbeing of our employees and that of our communities.

In these unprecedented times, our thoughts are with everyone personally affected by the spread of COVID-19 and we are grateful for the medical staff working on the frontlines.

As many of us operate from home, we’re also focused on being here for you. We’re working hard to continue to be your resource for information and inspiration. Our lines are open and our North American website is taking orders.

If you need a dose of adventure stoke, check out our brand blogs and YouTube channels for everything from gear maintenance tips to future trip ideas. Or just say hi to us on social.

As adventurers, we know things can go sideways fast, but it’s how we respond that makes all the difference. Right now, our ability to adapt and truly be there for each other like never before will allow us to navigate this extraordinary challenge and emerge even stronger—together.

From all of us at Cascade Designs, stay safe, stay creatively social, keep looking up.

Therm-a-Rest mondoking-3d-classic-valve mondoking-3d-classic-valve mondoking-3d-classic-valve

MondoKing™ 3D Sleeping Pad - Classic Valve

MondoKing™ 3D Sleeping Pad - Classic Valve

Sleep like camp royalty with our thickest luxury mattress.
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Sleep like camp royalty with our thickest luxury mattress.


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. Stuff sack included.
WARNING: Can expose you to toluene, which is known to the State of California to cause birth defects or other reproductive harm.

Learn more about Prop 65

    Features

  • Stable Comfort: 4 inches (10 cm) of stabilized loft provides the comfort of home anywhere.
  • Updated Fabric: Supple stretch-knit fabric provides deluxe breathability and plush surface.
  • Giant 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 other 3D mattresses.
  Large XXLarge
SKU 10761 10762
Color Marine Blue Marine Blue
R-Value 11.4 11.4
Weight (Standard) 5 lbs 8 oz 6 lbs 12 oz
Weight (Metric) 2.50 kg 3.07 kg
Width (Standard) 25 in 30 in
Width (Metric) 63 cm 76 cm
Length (Standard) 77 in 80 in
Length (Metric) 196 cm 203 cm
Thickness (Standard) 4 in 4 in
Thickness (Metric) 10 cm 10 cm
Packed dimension (Standard) 9 in x 26 9 in x 31
Packed dimension (Metric) 23 cm x 66 cm 23 cm x 79 cm
Top fabric type 50D polyester knit 50D polyester knit
Bottom fabric type 50d Polyester 50d 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

Limited Lifetime Warranty

Every piece of Therm-a-Rest gear is designed to endure the rigors of your time in the backcountry. We offer a Limited Lifetime Warranty on all products, except electronic devices, which have a 2-year Limited Warranty.

Better Sleep Guarantee

All Therm-a-Rest sleeping bags and quilts are also covered by our Better Sleep Guarantee. When you wake up on a Therm-a-Rest sleeping bag or quilt, we're confident you'll wake up feeling better than ever. If you are not completely satisfied, return it within three months with the original receipt of purchase and we will give you a full refund- no questions asked.

To get your gear repaired, start a warranty claim or to learn more, visit Therm-a-Rest Warranty for more info.

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