A MummyLiner is an extremely lightweight, mummy-shaped inner sleeping bag designed to protect your sleeping bag from dirt and enhance warmth in warm and tropical climates. Made from Egyptian cotton, this fabric is known for its rarity and long fibers, which allow it to be spun into fine yarn. The fabric woven by Cocoon is softer, lighter, and more durable than regular cotton, offering an excellent balance between conventional cotton and silk. This makes it ideal for budget-conscious buyers who do not want to compromise on quality and functionality during outdoor adventures.

Cocoon MummyLiners are available in various high-quality materials and feature a mummy shape. Key details include a head area that can be cinched to form a hood, a wide entrance opening, a specially sewn foot area, and excellent craftsmanship with a thoughtful cut.

The material composition is 100% cotton with double stitching for added durability. The dimensions are as follows: length 241 cm, packed size 15 x 8 cm, shoulder width 90 cm, and foot width 56 cm. The weight is 450 g, and the thermal performance is rated at 3.9 °C. The product includes a stuff sack and can be washed at 40 °C in a normal wash cycle.