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Therm-a-Rest MondoKing 3D Self-Inflating Camping Sleeping Pad: specs and car camping fit

Updated 2026-09-24 ยท Researched from published specs and verified owner reviews

Quick answerThe Therm-a-Rest MondoKing 3D Self-Inflating Camping Sleeping Pad lists at $259.95. Compare it against the alternatives below and in our sleeping pad picks.
Listed specifications
BrandTherm-a-Rest
TypeSleeping pad
Price when checked$259.95

Figures are taken from the Amazon listing title and feature bullets. Prices change often.

What does it mean for car camping?

Compare it against the alternatives below and in our sleeping pad picks.

What the listing says

  • Camp like royalty with the MondoKing 3D, an ultra-comfy 4.25-inch thick sleeping pad with a stretch knit fabric layer for resting better under the stars
  • Utilizing two one-way valves, one for inflation and one for deflation, the TwinLock valve system makes setting up and breaking camp a breeze
  • 7.0 R-value insulates in the most extreme conditions using StrataCore construction that utilizes a continuous layer of thermal foam nestled between alternating ridges of air and foam
  • 3D construction creates vertical sidewalls to maximize useable sleep surface and comfort
  • StrataCore construction allows the pad to easily compress and pack away to a compact 26x10.3 inches in included PFAS-free storage sack
  • For best performance, inflate your self-inflating pad with air by breath or included pump sack and leave the mattress fully inflated for 2-4 hours before your first use

Seller-provided feature bullets, quoted as listed, not independently verified.

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Researched guidance, not professional advice. Figures are published specifications or clearly labelled conventions; check your own gear's manual and your campground's rules.