Sea To Summit

Sea To Summit Thermolite Reactor Compact Plus Liner

Increases sleeping bag performance by up to 20°F (11°C) with dual-weight Thermolite® fabric. Our regular 80 g/m is combined with panels of 110g/m Thermolite® in the core body and foot bed areas adding extra warmth where most needed. The compact, shorter design shaves off excess weight while giving maximum warmth for torso and feet.



  • 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

Technical specs

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



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