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Sea To Summit Thermolite Reactor Liner

This product is temporarily sold out

The Thermolite Reactor increases sleeping bag performance by up to 8°C with 80g/m² Thermolite fabric. It is ideal as part of a cold climate sleep system, or as a standalone bag in warm weather. The Thermolite Reactor is made from the lightest of Thermolite fibres.


  • Adds warmth to a sleeping bag
  • Mummy shape with a box foot
  • Draw cord hood with mini cord lock
  • Packs into its own UltraSil® stuff sack
  • Lighter in weight, more packable than fleece
  • Machine washable
Barcode 9327868000197
Color Black
Brand Sea to Summit