A best-selling liner from Sea to Summit. Uses the lightest 80g/sqm Thermolite fabric. Thermolite is a hollow fiber that is lightweight yet provides excellent warmth and breathability. The Thermolite Reactor increases the warmth of a sleeping bag by up to 8 degrees Celsius and can be used alone in summer. * Lighter and more compact than fleece types * Mummy shape with footbox * Drawcord hood with mini cord lock * Edging on the opening for increased visibility * Includes an Ultra-Sil stuff sack * Weight: 248g * Size: Standard (210cm long x 92cm wide) * Packed size: 11 x 15 cm diameter * Temperature increase: 8°C