Made from 100% premium silk fabric, the Coccoon Silk MummyLiner is light, breathable, packable, soft to the touch, making it great for backpacking and adventure travel. It responds well to changing temperatures, keeping you cool in the tropics and toasty in the mountains. Once you have slept in a Cocoon silk liner you will never want to miss this feeling again on your travels. 100% premium quality silk fabric. Adds up to 9.5F of warmth. Great for backpacking or adventure travel. Keeps your sleeping bag clean. Wt. 4.7 oz. Size: 95 x 35 22 in.