Helsport’s removable sleeping bag liners are available in both rectangular and mummy shapes. Removable liners make cleaning your sleeping bag a breeze, save your sleeping bag from wear and tear and increase sleeping comfort by increasing the insulation properties dramatically. You can also use your liner by itself on warmer nights. New for 2010 are the super soft liners, made specially for, and with the same concept as the Glitterheim airvent™ sleeping bag series, wide shape and comfortable fabric.