Sea to Summit Thermolite Reactor Extreme Liner


SKU: 9327868022304 Category:



Increases sleeping bag performance by up to 14°C (25°F) with super-insulating 110g/m² Thermolite® fabric. Spacious design allows for a comfortable night’s sleep, even when the mercury plummets. Thermolite® is a hollow core fibre that provides extraordinary warmth for its weight and remains extremely breathable. Adds warmth to a sleeping bag or, used alone, is the ideal warm weather bag.

With the stretchy knit fabric that moves with you and a drawcord hood, the Thermolite® Reactor Extreme liner is perfect for wrigglers and rollers or anyone who needs some extra warmth.


  • Packs into its own Ultra-Sil™ Cordura® Stuff sack
  • 110g/m² Thermolite® construction throughout
  • Adds warmth to a sleeping bag
  • Mummy shape with a box foot
  • Draw cord hood with mini cord lock
  • Colour of liner is red
  • Weighs 399g (14oz)


Additional information

Weight0.399 kg
Dimensions210 × 90 cm


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