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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. Our bestselling sleeping bag liner!
We only have regular in stock, but drop us a line if you need large!