Mummy version liner with a drawcord base, the stretch-knit fabric offers incredible freedom of movement. In humid conditions, the blend of 70% Coolmax Ecomade and 30% biobased Tencel Lyocell fibres wick moisture effectively to prevent you feeling clammy. Outdoor users will usually opt for the Mummy version, which stretches to fit any sleeping bag shape. Rest assured you will have a hygienic sleep environment wherever you rest your head.