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Sea To Summit Reactor Extreme Sleeping Bag Liner - 2 Sizes

$114.95 CAD A3207

With a mummy shape and Thermolite Pro fabric, the regular Sea to Summit Reactor Extreme Liner featuring a drawcord uses new infrared technology paired with comfortable stretch fabric to add warmth, versatility, and increased insulation. The Reactor Extreme feature offers additional heat retention best suited to cold conditions.

  • Thermal boost to retain heat and warmth. As the core of your sleep system the Reactor liner extends the performance of your sleeping bag and sleeping mat in the coldest of conditions
  • Thermolite® Pro technology using knitted, hollow-core fibres and infrared-absorbing ceramic pigments to reflect your body's heat back for enhanced warmth and comfort
  • Drawcord footbox and shoulder openings can be opened or closed for optimal comfort and integrates perfectly with the footbox of our Free-Flow Zip system in select Sea to Summit sleeping bags
  • HeiQ Fresh odour control technology helps keep the liner fresh even after extended use
  • Knitted fabric provides incredible stretch and freedom of movement in this mummy-shaped liner and works perfectly with sleeping bags of any shape
  • Sizing; 2 Sizes [Compact & Standard]
  • Type: Mummy 
  • Fabric: 72% Thermolite, 28% natural silk, Thermolite infrared technology
  • Sustainability: Fabric is made from 50% recycled yarns
  • Dimensions:
    • Compact - 78in x 31.5in [198cm x 80cm]
    • Standard - 85in x 31.5in [216cm x 80cm]
  • Weight: 
    • Compact - 12.4oz [353g]
    • Standard - 13.5oz [383g]
  • Usages: Camping, Travelling


  • Thermolite Pro: Thermolite Pro has engineered hollow fibres like standard Thermolite but with the addition of permanent ceramic pigments that absorb the body's infrared rays and reflect them back to the wearer.
  • Thermolite EcoMade: The recycled Thermolite EcoMade fibers are made from 100% textile waste, are GRS-certified, and offer the same
    quality and durable lightweight warmth as their polymer virgin counterparts but with a lower carbon footprint


TREATMENT: Sea to Summit Liners are treated with HeiQ Fresh FFL

  • HeiQ Fresh FFL, a biocide-free, highly effective odor control technology that uses a bio-based Amino Sugar Polymer to neutralise body odour