A MummyLiner is an extremely lightweight, mummy-shaped inner sleeping bag. Uses: - as a comfortable, skin-friendly inner sleeping bag - to protect the sleeping bag from dirt - to enhance the thermal performance of your sleeping bag - as a sleeping bag in warm and tropical climates. Silk-Cotton: Silk-Cotton (55% silk, 45% Egyptian cotton) combines the benefits of two luxurious materials. Like silk, it is extremely lightweight, temperature-regulating, compact, and skin-friendly. The cotton content provides durability and moisture-wicking properties. Care tips: Hand or machine wash (30 °C gentle cycle) with a mild detergent. Dry cleaning is possible. Do not bleach or treat with stain removers. Wash separately. A splash of vinegar in the cold rinse water maintains shine and colors. Hang to dry or spin lightly. Do not wring.