Product details:

Adding an additional 9.5 degrees (Fahrenheit) of warmth and increasing the longevity of your sleeping bag, the Cocoon TravelSheet Silk rectangular bag liner is a valuable, addition to your gear closet. The fast-drying, lightweight TravelSheet Silk can also serve as a warm-weather travel sleeping bag. Each TravelSheet Silk includes its own integrated pillow pocket and a Velcro-secured side opening. The TravelSheet Silk helps to keep your sleeping bag clean and, at the end of a trip, you can launder just the TravelSheet and extend the life of your sleeping bag by not subjecting it to frequent washings. Available in your choice of colors, the Cocoon TravelSheet Silk measures 86' x 35', weighs just 6.3 ounces. And fits conveniently inside its own included stuff sack.