The Isolahti is a real all-rounder! You can use this liner with a sleeping bag to gain up to 7 degrees more warmth. Your sleeping bag stays clean and moisture is quickly transferred. Thermolite® dries 20% faster than other insulation fibers and 50% faster than cotton. But also as a hut sleeping bag it is practical: Small packed and light in weight, the Isolahti is not a burden. And of course you can easily use this liner in warmer areas as a stand-alone sleeping bag.