Liberty Mountain Silk Sleep Sack
Here's what other sites are saying:
The Silk Sleep Sack can be used in any style sleeping bag and helps add 10-12 degrees F to your sleeping bag keeping you warm on chilly nights. Made of 100% silk with pillow compartment. Includes waterproof stuff sack. Single: Dimensions: 36" x 84" Weight: 5 oz.
- Appalachian Outdoors