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Thermarest MondoKing 3D Sleeping Pad

  • Product Number: 4539 - 8401157

The MondoKing 3D provides our highest level of comfort and support. Boasting 4.25 inches (11cm) of premium foam, the ultra-cozy pad combines a plush next-to-skin feel with an 7.0 R-value to keep you warm and comfy in any condition or season. StrataCore construction provides lofty three-dimensional shape, and compresses easily to save room in your trunk or closet. The extra-comfy self-inflating pad features the easy-to-use TwinLock valve, allowing the pad to inflate three times faster and deflate five times faster. Like all Therm-a-Rest pads, the MondoKing 3D is made in market to ensure quality and minimize environmental impact. The pad includes a go-anywhere stuff sack with a built-in pump sack.


  • Stable Comfort: 4 inches (10 cm) of stabilized loft provides the comfort of home anywhere.
  • StrataCore Construction: Yielding an impressive warmth-to-weight ratio, StrataCore uses a continuous layer of thermal foam nestled between alternating ridges of air and foam.
  • Comfortable 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.
  • Easy to Pack: StrataCore construction allows the pad to easily compress and pack away.
  • Mateable: Mates perfectly with other 3D mattresses.
  • TwinLock Valve: Utilizing two one-way valves, one for inflation and one for deflation, the TwinLock valve system makes setting up and breaking camp a breeze.
  • Pump stuff sack included


  • R-Value: 7.0
  • Weight (Standard): 4 lbs 6 oz
  • Weight (Metric): 1.99 kg
  • Width (Standard): 25 in
  • Width (Metric): 64 cm
  • Length (Standard): 77 in
  • Length (Metric): 196 cm
  • Height (Standard): 4.25 in
  • Height (Metric): 11 cm
  • Thickness (Standard): 4.25 in
  • Thickness (Metric): 11 cm
  • Packed dimension (Standard): 10.3 in x 26 in
  • Packed dimension (Metric): 66 cm x 26 cm
  • Top fabric type: 50D polyester knit
  • Bottom fabric type: 75D polyester
  • Foam type: Urethane Foam
  • What's Included: Pump/Stuff sack
  • Material(s): Polyester, Polyurethane