Sea To Summit Thermolite® Reactor Liner

With a stretchy knit fabric that moves with you, the Thermolite Reactor liner is perfect for wrigglers and rollers or anyone who needs some extra warmth.




  • Increases sleeping bag warmth by up to 8°C
  • Made from Dupont Thermolite® fabric
  • Box foot & hood design
  • Stretchy & soft knit fabric
  • Quick drying
  • Drawstring hood
  • 265gm / 9.2oz