Cocoon Women&#39;s 100% Silk MummyLiner (Natural White, 83-Inch x 35/22-Inch) 100% Silk Imported high quality silk is the optimum fabric for minimizing packing size and weight. Silk is soft against your skin and responds well to changing temperatures - it feels cool in the summer and is warm in the winter. Mummy Liners made of silk are easy to hand or machine wash and dry quickly. Woven with a grid-like structure of strong silk threads, Ripstop Silk is more durable and resistant to tearing than regular silk