Therm-a-Rest MondoKing 3D Self-Inflating Sleeping Pad, Large – 77 x 25 in

Sleep Like Royalty Outdoors

Elevate your outdoor rest with the Therm-a-Rest MondoKing 3D self-inflating sleeping pad. The large 77 x 25-inch surface offers generous cushioning for car campers, basecamps, RV travelers, and boat trips, while doubling as a comfortable guest bed at home. The pad blends thick support with thoughtful design to help you unwind after a day of exploration, without sacrificing portability or ease of use.

Why it stands out

• 4.25 inches of cushion and 3D vertical sidewalls maximize usable surface so you can settle in without feeling the edges.
• StrataCore insulation pairs a continuous foam core with alternating ridges of air and foam, delivering an impressive 7.0 R-value for warmth in varied conditions.
• TwinLock valve system features separate inflow and outflow valves for smoother setup and quick breakdown.
• Compatible with other MondoKing pads for modular, double-wide sleeping arrangements when needed.
• Includes a pump sack that doubles as a pump for breath-free inflation, plus a PFAS-free storage sack for responsible packing.

Smart design features

• 3D construction creates vertical sidewalls to maximize the usable sleep surface within the footprint.
• 7.0 R-value insulation helps keep you warmer on chilly nights, while staying compact when packed.
• Large size measures 77 x 25 inches and rolls to 26 x 10.3 inches for easy transport.
• Weighs about 4.38 pounds, balancing cushion with portability for car camping and trips.
• Made in the USA and backed by a manufacturer’s limited lifetime warranty for long-term reliability.

Practical tips: For best results, inflate with air and keep fully inflated for 2–4 hours before first use. If you need more space, pair with a second MondoKing for a double sleeping area.