Sea to Summit Thermolite Reactor Sleeping Bag Liner - Adds up 8°C

Sea to summit


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The Sea to Summit Reactor Sleeping Bag Liner is made from Thermolite®, a hollow core fiber that provides extraordinary warmth for its weight and remains extremely breathable. This liner adds up to 14º F / 8º C of warmth to a sleeping bag or, used alone, is the ideal warm weather bag.

NOTE: The degrees' addition are referential only, this might vary due to different factors such as insulation type of your sleeping bag.


  • Lighter weight, more packable than fleece.
  • Adds up to 14º F / 8º C of warmth to a sleeping bag.
  • Mummy shape with a box foot.
  • Draw cord hood with mini cord lock.
  • Packs into its own 3 in x 5 in Ultra-Sil™ stuff sack.
  • Easy to wash and helps to keep your down bag cleaner for longer.


DIMENSIONS 82 in / 208 cm
STUFF SACK SIZE 5.75 x 4 in / 15 x 11 cm
8.7 oz / 248 g

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