The Silk TravelSheet by Design Salt is a lightweight sleep sack made from silk that lines your sleeping bag or bed. It features a pillow pocket, reinforced gussets, double stitching and a side opening that can be secured with Velcro for ease of use. Each TravelSheet fits into a very small stuff sack, which makes them very easy to pack into any bag. Washing just your liner will protect your sleeping bag from excessive wear and tear. With the ease of washing, you can always sleep clean and comfortable.