Therm-a-Rest MondoKing 3D Self-Inflating Sleeping Pad XX-Large 80x30 Lyons Blue

Sleep Like Camp Royalty with the MondoKing 3D Self-Inflating Pad

Fill your next camping trip with comfort and warmth using the Therm-a-Rest MondoKing 3D Self-Inflating Foam Camping Mattress. The XX-Large model provides a generous 80 x 30-inch surface and a plush 4.25-inch profile, paired with a durable Lyons Blue cover. This pad balances luxury with rugged practicality, making it a versatile choice for car camping, basecamps, RV adventures, boats, or hosting guests at home.

The standout feature is StrataCore insulation: a continuous layer of thermal foam framed by alternating ridges of air and foam. This design yields a robust 7.0 R-value, delivering reliable warmth across a wide range of conditions while keeping the overall footprint manageable for travel. The result is a stable, cushioned sleep surface that can help you settle in quickly after a long day outdoors.

What makes the MondoKing 3D special

• 7.0 R-value insulation with StrataCore construction for comfortable warmth
• 3D vertical sidewalls to maximize usable surface area and sleeping space
• Two one-way valves for simple inflation and deflation, with TwinLock offering an even thicker option
• Durable self-inflating foam core compresses for easy packing, yet expands to 31 x 10.3 inches when stored

Versatility and real-world use

This pad is designed for a variety of setups: car camping, expedition basecamps, RVs, and boats, as well as serving as a comfortable guest bed at home. It can pair with another MondoKing for a larger double sleeping surface, which is ideal for couples who want a shared night under the stars or inside a cozy camper.

• Suitable for couples when paired with a second MondoKing for a double surface
• Made in the USA with a limited lifetime warranty for long-term peace of mind

Specs at a glance and setup tips

XX-Large size measures 80 x 30 inches with a thickness of 4.25 inches when inflated (4.0 inches on Standard Valve models and 4.5 inches on TwinLock models). Pack size is compact at approximately 31 x 10.3 inches, and the pad weighs about 5.5 pounds. Each package includes a stuff sack or pump sack for easy setup. For best performance, inflate with air and allow the pad to settle for 2–4 hours before first use.