The THERMOLITE® Reactor Extreme uses our super insulating 110g/m² to seriously increase sleeping bag performance by adding up to 15°C of warmth. The spacious design is slightly tapered from head to foot to reduce weight and increase thermal efficiency, and the drawcord hood can be cinched down for extra warmth when required. This knit fabric also has serious stretch to it, making the Reactor Extreme the ideal liner for the restless sleeper.

Adds extra warmth
Mummy shape with a box foot
Drawcord hood with mini cord lock
Extends life of sleeping bags by keeping them clean
Contrasting colour along the top edge makes it easier to find the opening
Packs into its own Ultra-Sil® stuff sack
Also available in a long version for the vertically blessed
110g/m² Thermolite® construction throughout

Length: 210cm (including hood)
Width: 90cm
Weight: 399g

Weight 0.4 kg


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