Sea to Summit Reactor Sleeping Bag Liner

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Color:Sulphur Yellow
Shape:Mummy w/ Drawcord
Only 1 left in stock! Usually ships within 24 hours.
Vendor: Sea To Summit
SKU: A3202

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The THERMOLITE® Reactor Extreme liner is Sea to Summit’s warmest knitted sleeping bag liner. If your adventures take you to colder climates, the Reactor Extreme will add plenty of warmth to a sleeping bag. Plus in warmer weather, it can be used as a ‘stand alone’ sleeping bag. The hollow core fibres of the THERMOLITE® fabric work like a polar bear's fur and, along with the knitted structure, trap plenty of insulating air. Super soft and amazingly stretchy, the Reactor Extreme uses a heavier version of THERMOLITE®  to provide extra warmth for an incredibly comfortable night’s sleep. Use one to build your cooler-weather sleep system and to help keep your sleeping bag clean too.

Highlight :

Best  Use: Backpacking & Camping

Weight14 oz | 399 g

Length6 ft 10 in | 210 cm

Packed Size: 6.5 x 4.5 in | 17 x 11.5 cm



  • Traps insulating air to increase warmth of a sleeping bag by up to 25°F / 15°C
  • Stretchy, Thermolite® fabric is incredibly comfortable.
  • 110g/m² fabric is warmer than the 80g/m² Thermolite® used in the standard Reactor.
  • Technical mummy-shape with drawstring hood.
  • Easy care – machine wash with no special soap needed. Avoid fabric softeners and dryer sheets.
  • Keeps sleeping bag clean.
  • Packs into its own Ultra-Sil stuff sack.

Tech Specifications :

  • DDED WARMTH : Up to 25°F / 14°C
  • BEST USE : Backpacking, Camping & Winter Camping
  • COMES WITH : Ultra-Sil stuff sack
  • MATERIAL(S) : Thermo lite polyester fabric
  • SHAPE :  Mummy

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