Description 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 Length/Width 210 x 90 cm Suitability Cool Weather Weight 248g