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Our most popular 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 your sleeping bag or can be used alone as a warm weather bag.
We only have regular in stock, but drop us a line if you need large!