Therm-a-Rest MondoKing 3D Self-Inflating Sleeping Pad XX-Large (80 x 30)

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

Imagine resting on a cushion that blends luxury comfort with rugged outdoor performance. The Therm-a-Rest MondoKing 3D Self-Inflating Sleeping Pad, XX-Large at 80 by 30 inches, delivers a truly supportive surface that cushions against rocks, roots, and uneven ground. At 4.25 inches thick, it sits tall enough to conquer bumpy terrain while still maintaining a manageable pack size. Weighing about 5.5 pounds, this pad balances substantial support with travel-friendly heft, making it ideal for car camping, expedition basecamps, RVs, boats, and even as a premium guest bed at home.

What makes this pad feel premium is not just its size, but the thoughtful insulation and stability built into the core. StrataCore construction places a continuous layer of thermal foam between ridges of air and foam, delivering warmth and resilience without adding bulk. The result is a dependable surface that stays comfortable across a range of temperatures and camping styles.

Key advantages at a glance

• 7.0 R-value for reliable warmth in cooler nights and varied environments.
• 3D vertical sidewalls maximize usable sleep surface and reduce roll-off risk.
• TwinLock valve system separates inflation and deflation for easier setup and breakdown.
• Includes a PFAS-free storage sack that doubles as a pump sack for breath-free inflation.

Real-world versatility

Designed to be paired with another MondoKing for a broader sleeping area, this pad is perfect for couples on a shared adventure or for guests at home. Its 80 x 30 inch footprint provides ample space for side sleepers and sprawled-out comfort, while the 4.25 inch thickness offers generous cushioning for long nights under the stars or in a cabin.

Setup and care tips

To deploy, unroll and begin inflation with air via the pump sack or a quick breath; allow the mattress to reach full loft and remain inflated for 2 to 4 hours before first use to optimize comfort and stability.

Specs you can rely on

• XX-Large size: 80 x 30 inches; thickness 4.25 inches
• Weighs about 5.5 pounds
• Made in the USA with a limited lifetime warranty
• Includes a stuff sack that also serves as a pump sack