SKU: TMTK09842

Thermarest Trail King SV Sleeping Mat

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Thermarest has combinded SpeedValvetechnology with AirFrameConstruction, creating a backpacking mattress that inflates in a matter of seconds. Plus, thanks to the auto-reversing SpeedValve, the mattress deflates at remarkable speeds. 

This unprecedented ease-of-use is fused with 2.5 inches of ultra-supportive loft and an R-Value of 1.8, making the Trail King SV a reliable, three-season mattress designed to save you precious time in the backcountry.

  • Packs Small: Air Frame construction minimizes bulk for easy packing.
  • Stable Comfort: Exceptional thickness with stabilizing foam support.
  • Durable: Proven materials and craftsmanship offer exceptional reliability.
  • Self-Inflating: Compressible foam core expands to inflate; add just a few breaths for your desired firmness.


  • R-Value: 1.8
  • Thickness: 6.3 cm
  • Top fabric type: 75 D Polyester
  • Bottom fabric type: 75 D Polyester
  • Core: Urethane Foam
  • Colour: Macaw Print
  • Stuff sack included
  • Warranty Period: Reasonable lifetime of the item given normal use.

Regular Size:

  • Weight: 830 g
  • Width: 51 cm
  • Length: 183 cm
  • Packed dimension: 28 x 17 cm
  • Product Code: TMTK09842

Large Size:

  • Weight: 1.08 kg
  • Width: 63 cm
  • Length: 196 cm
  • Packed dimension: 33 x 18 cm
  • Product Code: TMTK09843