Thermolite® Reactor

Increase the warmth of your sleeping bag and your sleeping comfort.


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210 x 90 cm
Cool Weather
Selling Price

The Thermolite® Reactor increases sleeping bag performance by up to 8°C with 80g/m² Thermolite® fabric.  Our bestselling sleeping bag liner! The Reactor is made from 80g/ m² Thermolite®—the lightest weight Thermolite® fabric available. Thermolite® is a hollow core fibre that provides amazing warmth for its weight and remains extremely breathable. The Reactor adds up to 8°C of warmth to a sleeping bag or can be used alone as a warm weather bag.

  • Lighter weight, more packable than fleece
  • Mummy shape with a box foot
  • Drawcord hood with mini cord lock
  • Contrasting color along the top edge makes it easier to find the opening
  • Packs into its own Ultra-Sil® stuff sack


Thermolite® Reactor Fleece Liner

The first choice when you need to add some extra warmth to your sleeping bag.


Thermolite Reactor Extreme

Increase the warmth of your sleeping bag and the get a better nights sleep with this light weight liner.


Thermolite Reactor Compact Plus

Increase your sleeping bag performance with dual weight Thermolite® fabric.


Premium Stretch Knit Expander Liner

This stretchy poly-cotton liner lets you sleep easily and avoid tangles as you turn in the night.

From £28.00

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