Sea To Summit | Reactor Liner (adds up to 14°F)

SKU: STS-119

Sale price$69.95

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Sea To Summit | Reactor Liner (adds up to 14°F)

The THERMOLITE® Reactor™ liner is an excellent cold weather option for those who need additional warmth. The hollow core fibers trap heat and offer extraordinary insulating properties. This is a super stretchy, soft, and comfortable choice with a mummy shape, foot box and a drawcord hood. Compact and lighter weight than fleece.


Packed Size Comparison
Similar to a small foam football

8.7 oz ≈ Two sticks of butter

Adds up to 14°F to the temperature range of your sleeping bag

Easy to wash and helps to keep your down bag cleaner for longer


  • Adds up to 14°F / 8°C of warmth to a sleeping bag
  • Lighter weight, more packable than fleece
  • Mummy shape with a box foot
  • Drawcord hood with mini cord lock
  • Thermolite polyester fabric 
  • Packs into its own Ultra-Sil™ stuff sack
DIMENSIONS                82 in / 208 cm
STUFF SACK SIZE       5.75 x 4 in / 15 x 11 cm
WEIGHT                         8.7 oz / 248 g

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