Sea to Summit  Thermolite Reactor Compact Plus Sleeping Bag Liner

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Combining 2 different weight fabrics, this Sea to Summit Thermolite Reactor Compact Plus sleeping bag liner adds 20°F of warmth and extends the life of your sleeping bag.


  • Constructed of insulating Thermolite fabric, a hollow-core, breathable fiber that provides extraordinary warmth for its weight
  • Combined with the regular 80g/m² Thermolite, super insulating 110g/m² Thermolite panels provide added warmth in the torso and foot bed areas
  • Adds up to 20°F of warmth to a sleeping bag; can also be used as a summer ultralight sleeping bag
  • Liner helps keep the inside of your bag clean, saving it from the wear and tear of washings
  • Drawcord hood with mini cordlock cinches around face to hold warmth in
  • Mummy shaped liner features a 3D footbox providing plenty of room for feet
  • Sea to Summit Reactor Plus Themolite comes with a lightweight Ultra-Sil™ stuff sack
  • Compact, short design is ideal for women or anyone under 6 ft. tall


View all Sea to Summit Sleeping Bag Liners

Technical Specs

Item #797113
Best Use


Sleeping Bag Shape


Added Warmth (F)

Up to 20 degrees

Added Warmth (C)

Up to 11.1 degrees

Stuff Sack Size

4 x 6 inches




72 x 36 inches


9.3 ounces

110 reviews with an average rating of 4.4 out of 5 stars

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