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Sea to Summit Reactor Extreme Thermolite Liner

  • Product Number: 1936 - 3361240

Increase your sleeping bag performance by up to 14 C (25 F) with the super insulating Reactor Extreme.  Made with 110g/m synthetic Thermolite insulating fabric, this liner provides extraordinary warmth for weight while remaining breathable so you don't overheat.  Cut spacious to provide a comfortable sleep, this liner is perfect for stretching your sleeping bag to the maximum, or on its own as a lightweight bag in cool temperatures.


  • 110g/m2 Thermolite® construction throughout
  • Adds up 25°F (14°C) to warmth to a sleeping bag
  • Mummy shape with a box foot
  • Draw cord hood with mini cord lock
  • Packs into its own Ultra-Sil™ stuff sack
  • Color of liner is orange
  • Weighs 14 oz / 399g
  • Dimensions: 84" / 210cm x 36" / 90cm