Sea To Summit Reactor Thermolite Liner

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$13.99 (20%)
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Our most popular sleeping bag liner! The Reactor is made from 80g/m² THERMOLITE®—the lightest weight THERMOLITE® fabric available. THERMOLITE® is a hollow core fibre that provides amazing warmth for its weight and remains extremely breathable. The Reactor adds up to 8°C of warmth to your sleeping bag or can be used alone as a warm weather bag.

  • Thermolite® insulation is a hollow-core fiber that provides extraordinary warmth for its weight and remains extremely breathable
  • It's very comfortable, more compact and warmer for its weight than fleece liners
  • Adds up to 14°F (8°C) of warmth to a sleeping bag, or can be used on its own as the ideal warm-weather bag
  • Thin drawcord with tiny cord-lock around the hood
  • Very light and compact
Technical Specs
Best Use-


Sleeping Bag Shape-


Added Warmth (F)-

Up to 15 degrees

Added Warmth (C)-

Up to 8 degrees

Stuff Sack Size-

3 x 5 inches




82 x 35 inches


8.1 ounces

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