Rab Ionosphere 5.5 Sleeping Mat (690g)

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Equipped with ground-breaking heat-reflective TILT technology and air-trapping Stratus™ R insulation, this compact sleep mat is designed to offer unrivalled comfort for alpinists and mountaineers in the world’s toughest conditions.

R-VALUE : 5.5

Crafted for extreme temperatures and hostile environments, the Ionosphere 5.5 is fully equipped with the tech to insulate you from the freeze. Its design reduces heat loss through both radiation and convection, thanks to the heat-reflective TILT technology and air-trapping Stratus™ R insulation. With a superior warmth-to-weight ratio and small pack size, it’s the perfect high-comfort sleep mat for alpinists and mountaineers who need to hunker down in the world’s most challenging conditions.

The mat features clever details to maximise your comfort, including oversized outer chambers to keep you central on the mat, and a grip print to reduce sleeping bag slip. The fabric has a soft next-to-skin feel while the versatile rectangular shape will ensure you can rest comfortably whatever your preferred sleeping position. A low-profile two-way valve and handy pump sack allow you to quickly inflate the mat when the temperature plummets and you’re ready to turn in.

Made from 100% recycled insulation, recycled fabric and a fluorocarbon-free DWR, the Ionosphere 5.5 is built to thrive in hostility. From frosty bivis to alpine starts, it will ensure you can comfortably restore reserves wherever you set up camp.

The Specifics

  • Main Fabric:20D Recycled Polyester outer fabric with internal TPU Coating and fluorocarbon free DWR
  • Insulation:Stratus™ R 100% recycled polyester 200gsm insulation with TILT
  • Weight:Reg: 690g. LongWide: 950g
  • R-Value:5.5
  • Packed Size:Regular 24cm x 12cm (9.4in x 4.7in) / Long Wide 30cm x 14cm (11.8in x 5.5in)
  • Product Code:QMA-01
  • Stratus™ R insulation traps air and reduces heat loss from convective currents
  • TILT reflective film within the insulation helps reduce radiant heat loss
  • R-Value: 5.5
  • Thickness: 8cm
  • Lightweight construction uses air and insulation for superb warmth-to-weight ratio and minimal pack-size
  • Oversized outer chambers helps keep you centralised on the mat
  • Graduated grip print finish on upper fabric reduces sleeping bag slip
  • Hybrid rectangular shape allows various comfortable sleeping positions
  • Low profile two-way valve for easy inflation and deflation
  • Pump sack included for rapid and hygienic inflation
  • Roll-away stuff sack with repair kit included
  • Dimensions: Regular 183x51cm. Large 196x64cm
  • Packed Size: Regular 24x12cm. Large 30x14cm.

R-Value: 5.5

Your sleep mat’s R-value is an indication of how well it will resist heat loss. A higher R-value means it will insulate you more effectively from the ground underneath, and will be better suited to cold environments.

Stratus™ R

Resilient synthetic insulation developed with 100% recycled post-consumer material. Designed to trap the maximum amount of air possible, Stratus™ R boasts superior warmth for its weight, retains warmth when wet, and dries quickly.

What is TILT technology?

A radical, heat retaining tech that works like an emergency blanket reflecting heat back towards your body, while maintaining breathability and comfort. Boosting thermal efficiency, it keeps you warm when the temperature plummets.