A MummyLiner is an extremely light mummy-shaped inner sleeping bag designed to protect your sleeping bag from dirt and to increase warmth in warm and tropical climates. Made from Egyptian cotton, this fabric is known for its rarity and long fibers, allowing it to be spun into fine yarn. The fabric woven by Cocoon is softer, lighter, and more durable than normal cotton, providing a great balance between regular cotton and silk. This makes it ideal for those who are price-conscious but do not want to sacrifice 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 section that can be pulled together to form a hood, a wide entry opening, a specially sewn foot section, and excellent workmanship with a well-thought-out cut.

Material composition is 100% cotton with double seams for added durability. The dimensions are as follows: length of 241 cm, pack size of 15 x 8 cm, shoulder width of 90 cm, and foot width of 56 cm. The weight is 450 g, and the heat output is rated at 3.9 °C. The product includes a packing bag and can be washed at 40°C on a normal wash cycle.